I love YouTube as a grey-area on-demand radio.. For a really simple music mash up I also made http://fmix.heroku.com http://fmix.heroku.com .. Enter an artist

I love YouTube as a grey-area on-demand radio.. For a really simple music mash up I also made http://fmix.heroku.com http://fmix.heroku.com .. Enter an artist or Song you like, click search for a last fm generated then randomized list.. Jump from a song you like into a new list. Has its limitations but works quite well for bgm (except when YouTube search gives a false positive though this can be hilarious)