Here are my top 10 artists of the last 6 months:

Eulogies
Black Moth Super Rainbow
Starfucker
The Bird and the Bee
K’naan
James Yuill
Mother Mother
Angus & Julia Stone
Viva Voce
Shout Out Out Out Out
Bell X1
Anderson
The Killers
The Boxer Rebellion
IAMX

At the beginning of 2008, I had heard of:

Viva Voce
The Killers

The other 8 bands I had not even heard of until last year. I discover all my new music here – http://www.spinner.com/new-releases (disclaimer: I work there). At this point I expect to find a new artist that I end up really liking every single week. I am positive this is not going to stop for the rest of my life.