I was turned on to blip.fm last spring. While I love Pandora.com, I needed a way to test out new music, hear from other DJ's, and get a certain song out of my head by "blipping" it. It's kind of like twitter - but your method of communication are the songs that you "blip" and can add to your own station. You give and receive "props" with other DJ's. My favorite DJ's are blipping anywhere from Brazil, to Spain, and NYC.
The playlist ranges from Thomas Dolby (love!), to Yelle (hello...I just found out about this groovy french girl), Beck, Lloyd Cole, Massive Attack, and beyond.