Weedshare secure?

http://www.weedshare.com/ is trying to make “Shareware Music” how robust is this?

Sounds like an intresting idea (maybe you wouldn’t have to wade through so many crappy songs to find good ones like other independant artist sites) but you are limited to windows media player files so you are really limited with what it will play on. Thats the killer for me. If I am going to buy it I want to play it in my car or my stereo or wherever.