I think I have some misunderstanding about Blip.fm. By its name, it's tend to compare to Last.fm. As far as I know, it's ok to compare Last.fm with Pandora. But it's not the case for Blip.fm.

Twitter, instead! Yes, Twitter. I have strong feeling for the word blip after hours, it's like tweet. How come? On Twitter, you simply tweet what you think with text. On Blip.fm, you can tweet (blip) with text and a song or music as well. So, when you blip, it's not all about the song but why you choose that song and what you think. And that's why Blip.fm also has @reply feature. Moreover, you can blip a song many times.

What do you think?