this was going to just be a post gathering up interesting links I've seen over the past few days -- but then I got caught up in the amazing thing that is musicplasma. I'd seen lots of blogs referencing it but hadn't actually seen it for myself until now. Type in a few band names and see your tastes mapped out in space like planets. It's fascinating -- in part because it shows how your disparate tastes connect up -- through genre or individual band members or other things that the programmer has decided form links.
the other link worth posting: Mr Picassohead .