Ok, so I downloaded & installed it. I like the idea behind it (ie: easily finding free mp3s online & playing them with a decent interface), but they really need to beef up the media-player aspect of it so that it seems less like "Firefox with an extension that plays mp3s." If this gave me the things I already have in iTunes and added the browsing mp3 blogs feature I would probably use it as my primary media library/player. I mean, it looks shiny and seems to have most of the playback features, but I can't find anything to do with cd ripping, any options in regards to where you keep your music, or any options that aren't do to with the browsing aspect of it.
I understand it's only release 0.2 though, so I'll be keeping an eye on it to see how things progress.