If you haven't heard of it, blip.fm is a site where you can 'blip' songs that you like and make a playlist of sorts for other people to stream. Unfortunately, the site isn't perfect and after awhile some songs stop working. So far, I've been pretty impressed by the selection of songs... they've had probably about 75% of the song's I've been looking for, which is pretty good.
If I had to recommend 3 songs on my playlist that are currently working, I'd choose:
The Dirty Projectors- Stillness is the Move
Animal Collective- Grass
Yaz- Situation