I've been listening to a lot of The Damnwells lately. They haven't become mainstream, but they are quite good. Their music is somewhat moody and it fits my frame of mind lately, which is likely why I have three of their albums on repeat as I write this.
This is their video for the song "Sleepsinging," which I believe is the only real music video they've done, though I could be wrong. I must admit that I'm not so much a fan of the video as of their music.
If you are interested in getting more from The Damnwells, you can find their music on iTunes, but it is actually (and unfortunately) cheaper to get their cds on Amazon (including shipping). Check them out if you like alt-rock/country type music.