Blip.fm
www.blip.fm
September unique visitors: 68,670
Change from August: -39.5%
Funding: Less than $10 million from undisclosed investors
Why it's unique: Think Twitter for the music-obsessed. Every time Blip users post a 140-character-or-less message, they choose a song to go along with it. Each user becomes a kind of DJ—picking tracks from an expansive catalog, and annotating them with bits of trivia, questions for listeners, or general thoughts.
How it plans to create revenue: The site draws a nominal fee each time a user likes a song enough to click over to Amazon (AMZN) and buy it. Founder Jeff Yasuda is in talks with all four major music labels to host their songs on Blip.fm, rather than stream them from various sources on the Web, as the site does now. The site plans to advertise music-related merchandise like T-shirts and concert tickets.
