Ellegarden has been on my antenna for a while, whenever I listen to their song on cable TV stations like MTV Japan. They're a Japanese alternative rock band (kind of emo + punk) and does really great tunes. I just downloaded their (probably first) major album "Riot on the Grill" from iTMS Japan and it surely rocks.
If you like New Found Glory, the Ataris or Blink-182, you'll definitely like ELLEGARDEN as well. Check out Last.fm artist page for more.