Blipster is an Adobe Air desktop client for Blip.fm (free streaming radio).
It plays MP3, YouTube, Imeem, allows you to edit incorrect artist/song title before blipping, sort and filter search results, features queue blips for posting, Last.fm integration (which lets you search for similar artists and scrobble your listened songs), and is close to full Blip.fm integration, which means you won't need to keep the website open while working, and more.