I didn't find any dedicated thread of this anywhere, so:
I would love to see some Jeff Buckley as Rock Band DLC. A lot of people aren't familiar with this man, but his music is amazing. He released only one album in 1994, and was working on a second when he drowned in the Mississippi River in 1997.
He was a strong songwriter, guitarist, and vocalist, and I think his music would be a great addition to Rock Band mostly for the vocals. His music is mostly alternative rock. I'd like to see a 3-pack of songs.
Unfortunately, SonyBMG has disabled embedding the official videos, so the videos are a little weird and amateur (except for Grace, which somebody outside of SonyBMG was kind enough to upload), but as long as you just pay attention to the music you'll be fine.
What do you think?