[Happymeal]

So far the sub-genres are:

Alt/Indie Rock:

!!!
10,000 Things
Afghan Whigs
Amusement Parks on Fire
..And You Will Know Us by the Trail of Dead
Arab Strap
The Arcade Fire
Archers of Loaf
Apostle of Hustle
Aqualung
Aqueduct
Art Brut
Athlete
Aveo
The Awesome Machine
Badly Drawn Boy
Beat Happening
Beck
Bjorn "Stringmachine" Berge
Big Black
Biffy Clyro
The Black Heart Procession
The Black Keys
Black Mountain/The Pink Mountaintops
Sarah Blasko
(The Jon Spencer) Blues Explosion
Bob Hund
Braid
Brainiac
Broadcast
Broken Social Scene
Bright Eyes
Jeff Buckley
Calexico
Castanets
Cat Power
Cave In
The Cooper Temple Clause
Cop Shoot Cop
Cougars
The Cranes
Cursive
Dead Moon
Deadly Snakes
Death Cab for Cutie
Death From Above 1979
Deerhoof
Denali
dEUS
Dinosaur Jr.
The Dismemberment Plan
Do Me Bad Things
Dresden Dolls
Earlimart
Elysian Fields
Enon
The Evens
Fairweather
Faith No More
Feeder
fIREHOSE
The Flaming Lips
Friends of Dean Martinez
John Frusciante
The Futureheads
Girls Against Boys
Guided by Voices
Glay
The Go! Team
Grandaddy
The Great Lake Swimmers
Gregor Samsa
Halo of Flies
PJ Harvey
Head Automatica
Heavy Vegetable
Hot Hot Heat
Hot Snakes
I am Kloot
The Icarus Line
The International Noise Conspiracy
Interpol
Jane's Addiction
Jawbox
Jawbreaker
Jets to Brazil
Joan of Arc
Juliette and The Licks
Karate
Kings of Convenience
Les Savy Fav
Low
Make Believe
The Make-Up
Manic Street Preachers
The Mars Volta
Maximo Park
Mclusky
Medications
Melvins
Mercury Rev
Metric
Mew
Mineral
Minus the Bear
The Mint Chicks
Miss Antartica
Missy Higgins
Modest Mouse
Modey Lemon
Mojave 3
The Mooney Suzuki
Motorpsycho
Moving Units
Murder by Death
Murder City Devils
My Morning Jacket
Mystery Jets
Nada Surf
The National
The National Bank
New Wet Kojak
Nick Cave and The Bad Seeds
Nine Black Alps
Out Hud
Panthers
The Paper Chase
Pavement
Pedro the Lion
Phoenix
Phoenix Foundation
Pixies
Pleasure Forever
Polvo
Pretty Girls Make Graves
Primal Scream
The Promise Ring
Public Image Limited
Q and not U
Queens of the Stone Age
Radiohead
Rainer Maria
REM
The Replacements
Damien Rice
Rilo Kiley
Rocket from the Crypt
Rufus Wainwright
Ryan Adams
Sebadoh
Shellac
Silver Jews
Sarah Slean
Sleater-Kinney
Slowreader
The Smashing Pumpkins
Elliott Smith
The Smiths
Sonic Youth
Sparklehorse
Special Needs
Spiritualized
Spoon
Stars
Stellastar
Stereolab
The Stone Roses
The Subways
Sunny Day Real Estate
The Sunshine Underground
Super Furry Animals
Talking Heads
Tangiers
Ted Leo and The Pharmacists
Tenacious D
Test Icicles
Thingy
Timesbold
Trans Am
Turin Brakes
TV on the Radio
The Unicorns
Velvet Teen
Violent Femmes
Tom Waits
The Walkmen
M. Ward
We Versus the Shark
Ween
Weezer
Weird War
The White Stripes
Wilco
Wintersleep
The Wrens
Yo La Tengo

Country:

Jimmy Buffet
Johnny Cash
Neko Case

Electronica:

Air
Aphex Twin
Autechre
Basement Jaxx
Boards of Canada
Brian Eno
Caribou
Daft Punk
Euphone
Four Tet
Fischerspooner
Jackson & His Computer Band
Jaga Jazzist
Kaada
Kid 606
Lemon Jelly
Manitoba
Matmos
Minotaur Shock
Mouse on Mars
Mu
PLAID
The Postal Service
Prefuse 73
Ratatat
Roni Size
S.O.L.O.
Shpongle
The Soft Pink Truth
Squarepusher
Two Lone Swordsmen
Young Gods
Zero 7
Zongamin

Folk:

Angels of Light
Animal Collective
Bonnie "Prince" Billy
Andrew Bird
Tim Buckley
The Decemberists
Devendra Banheart
Nick Drake
Thomas Dybdahl
Bob Dylan
José Gonzales
Iron and Wine
Mojave 3
My Morning Jacket
Neil Young
Neutral Milk Hotel
Okkervil River
Red House Painters
Six Organs of Admittance
Songs: Ohia/Magnolia Electric Co.
Sufjan Stevens
Sun Kil Moon
Ugly Casanova
Woven Hand

Indie Pop:

Architecture in Helsinki
Belle and Sebastian
The Comas
The Delgados
For Stars
Ivy
Komeda
Magnet
Moldy Peaches
Travis Morrison
Oh No! Oh My!(formerly named The Jolly Rogers)
Pinback
Archer Prewitt
Saturday Looks Good to Me
The Shins
The Starlight Mints
Tegan and Sara
Tilly and The Wall

Krautrock:

Can
Faust
Neu!

Other:

Antibalas Afrobeat Orchestra
Black Eyes
Boredoms
Boris
Captain Beefheart
Carnival in Coal
Current 93
Death in June
Einsturzende Neubauten
Esquivel
Bela Fleck and The Flecktones
The Gerogerigegege
Hella/The Advantage
Kaizers Orchestra
Kayo Dot
Lightning Bolt
Masonna
Maudlin of the Well
Merzbow
Mr. Bungle
Nils Petter Molvaer
Ken Nordine
Patrick Wolf
Pelican
Psychic TV
The Residents
Richard Cheese
Ruins
The Shining
Xiu Xiu
Frank Zappa
John Zorn/Naked City

Post-Hardcore:

Arab on Radar
Big Black
Cap'n Jazz
The Chinese Stars
Drive Like Jehu
Effigies
Ex-Models
Fugazi
Hot Water Music
Husker Du
Nation of Ulysses
Off Minor
Quicksand
These Arms are Snakes
Transistor Transistor

Post-Punk:

James Chance & The Contortions
The Cure
Echo & The Bunnymen
The Fall
Gang of Four
Richard Hell & The Voidoids
Joy Division
Magazine
Minutemen
Mission of Burma
Naked Raygun
New Order
Pere Ubu
The Ponys
Roxy Music
Suicide
Swans
Television
This Heat
Wire

Post-Rock:

1-Speed Bike
65 Days of Static
A Silver Mt. Zion
The Album Leaf
Amplifier
Bark Psychosis
The Dirty Three
Do Make Say Think
Dreamend
The Durutti Column
Fly Pan Am
Flying Saucer Attack
Explosions in the Sky
Gastr Del Sol
Godspeed You Black Emperor!
Hope of the States
Inlantic
June Of 44
Mogwai
Mono
Mum
Pele
Rachel's
The Red Sparowes
The Sea and Cake
Set Fire To Flames
Sigur Ros
Six Parts Seven
Slint
Talk Talk
Tortoise
Unwed Sailor
The Workhouse
Yawning Man

Psychedelia/Neo-Psych:

Acid Mothers Temple & The Melting Paraiso UFO
The Apples in Stereo
Bardo Pond
Beulah
The Brian Jonestown Massacre
Circulatory System
Comets on Fire
Dead Meadow
Dungen
Ghost
Gong
Of Montreal
The Olivia Tremor Control
Shuggie Otis
Silver Apples
Soft Machine
United States of America
The Zombies

Rap/Hip-Hop:

A Tribe Called Quest
Afu-Ra
Aesop Rock
Antipop Consortium
Beastie Boys
Binary Star
Blackalicious
Busdriver
Cannibal Ox
Curse Ov Dialect
Dalek
Darkleaf
De La Soul
Deltron 3030
Digable Planets
Dilated Peoples
Dr. Octagon
Edan
Eric B. and Rakim
Gang Starr
Gorillaz
Handsome Boy Modelling School
Jedi Mind Tricks
Jurassic 5
KMD
K-Os
Kid Koala
Kool Keith
Latryx
Madvillain
MF Doom
Mr. Lif
Mos Def
Murs
N.W.A.
Nas
Outkast
Peanut Butter Wolf
Public Enemy
Quasimoto
The Roots
Roots Manuva
Sage Francis
Slug
Slum Village
Soul-Junk
Warren G
Wu Tang Clan

Soul:

James Brown
Solomon Burke
Terry Callier
Curtis Mayfield
Otis Redding
Stevie Wonder

Shoegazer/Dream Pop:

Bethany Curve
Galaxie 500
The Jesus and Mary Chain
Lilys
Lush
M83
My Bloody Valentine
The Radio Dept.
Ride
Slowdive
Spacemen 3
Swervedriver

Stoner:

The Atomic Bitchwax
Corrosion of Conformity(Wiseblood album)
Electric Wizard
Fu Manchu
High on Fire
Kyuss
Masters of Reality
Monster Magnet
Nebula
Orange Goblin

Trip-Hop:

The Avalanches
Black Moth Super Rainbow
Blockhead
Cibo Matto
DJ Krush
DJ Shadow
Rob Dougan
Lamb
Lovage
Massive Attack
Portishead
Sneaker Pimps
Tricky
Ulver
UNKLE

I won't include bands that would be discussed in other forums in the list.