Since it's almost the end of the year, I thought I'd start a thread about bands you've discovered this year. They don't have to be new bands, just stuff you've started listening to this year. Here's my list:

Chevelle
Finch
Glassjaw
Thursday
The Used

Gamma Ray - Euro metal band fronted by a former member of Helloween. Lots of heavy riffing without coming off pompus or overbearing. Great stuff. Recently picked up pretty much all of their catalog in one fell swoop (thank you eBay!).

Dream Theater & Abandoned Pools.

God, too many to even start. I'll give you the ones that I listen to most often.

Godspeed You Black Emperor!
A Silver Mt. Zion
Helms
Mum
Interpol

Those all standout in my mind the most, but like I said...way too many to even begin listing.

"New" wise and notworthy:

Interpol
OK Go
Spoon

Come to think of it I must add:

The Walkmen
The Detroit Cobras
My Morning Jacket

I've discovered a bunch but for the most part they're bands I've known for more then a year but just got into this year:

Arch Enemy
Meshuggah
Soilwork
Darkthrone
Burzum
Emperor

I went and sold all my old cd's (mostly rap and pop rock) and bought a bunch of metal cd's. No looking back for me

Finch
The Starting Line
Thrice
Hot Water Music
Jawbreaker
Thursday
Something COrporate
Lucky 7
Riddlin' Kids
Sugarcult
yellowcard
Flogging Molly

someone just gave me a copy of Jack Johnson, whoa

He's not a band but just in case you are open to new artists in general - Eminem, surprisingly talented dispite all the bad press surrounding him.

The Apples in Stereo
Dimmu Borgir
Balzac
Thievery Corporation
Nile
Ryan Adams
Dishwalla
Zero 7

I'm sure there is others, but I don't feel like looking right now

Hmmm.... interesting topic.. though it seems that the stuff I've discovered this year all gets radio airplay. Most of the stuff mentioned so far I have never heard of.

Anwyays, my list is

Coldplay
Theory of a deadman
greenwheel
Remy Zero

and some others I can't recall at the moment.

Chameleons UK
Imperative Reaction
Gridlock
Beneath the Lake

Audiovent
The Hives
The Vines
Theory of a Deadman
Queens of the Stone Age
Audioslave

hmmm...most of the other stuff i've been listening to this year is bands that i've liked before hand....

Way too many to ever attempt to be comprehensive, but some great bands/artists I've just started listening to this year...

Chuck Prophet
Sigur Ros
Hella
90 Day Men
Lemon Jelly
Atmosphere
Rjd2
Umphrey's McGee
Kasey Chambers
Sound Tribe Sector 9

And you will know us by the trail of dead
Jack Johnson
Royskopp
Vines
Hives
South

Bands that I've turned my gf onto

Coldplay
Peter Gabriel

Finch
Taking Back Sunday
The Used
Transplants

Off the top of my head:

Absurd Minds
Angels & Agony
The Birthday Massacre
Echo Image
Informatik
Seabound

-matt

interpol
thrusday
white stripes

White Stripes
Dropkick Murphys
Travis

And I was never really huge on Bruce Springsteen before this year, if that counts.

British Sea Power
Minuteman
Polyphonic Spree
The Coral
Medicine 8
Athlete
Longview

I rediscovered SADE after seeing her concert dvd LOVERS LIVE.

Ryan Adams - fricking awesome! I had been looking at the Springsteen newsgroup everyday for about the past year, and I kept seeing NUMEROUS posts about Ryan Adams, so I decided to download some songs, downloaded New York, New York, and Firecracker... and WHOA... went out and bought Gold the next day (in under a week I had the two other albums as well)

Coldplay!

too many to list,

mostly metal acts, but some other styles, too:

Meshuggah
Symphony X
Lacuna Coil
Nightwish
In Flames
Nevermore
Iced Earth
Sentenced
Cradle of Filth
Opeth

Non Metal:
Wilco
Radiohead (why it took me so long, I'll never know)
the Beatles (I'd never given them a chance. what was I thinking?!)

a few obscure jazz trios whose names I can't currently recall (they're obscure, after all...)