the thread about twitter got me wondering, aside from DiS and maybe last.fm, iPlayer and Facebook, what sites and clever bits of web tech do you use?

now that the backend of DiS is FINALLY coming together we're looking at what things to integrate into DiS and trying to prioritise them so it'd be interesting to know what you do use, primarily what you use to consume things vaguely music related on the web? Either for streaming music, info, downloading, sharing your love of music, etc...

blogger? http://blip.fm ? Rss readers like google reader? http://songkick.com ? does anyone still use myspace? http://hypem.com ? SonicSwap? http://www.thesixtyone.com/ ? anything really amazing you think people should try using?