2009 is quickly becoming the year of the short attention span. Thanks in part to Twitter’s recent skyrocketing popularity, Blip.fm has been steadily increasing in buzz since its launch in July 2008. The site offers users the ability to build playlists on the fly by playing songs and attaching short accompanying messages (150 characters or less, of course).

Last.fm offers vastly more functionality than Blip.fm, including music recommendations based on songs you like. But who has time for anything more than a blip these days?

Do you think Blip.fm buzz will surpass Last.fm?