I Want Ideas

don’t know if such a site exists, but it would be cool to have a website which gathers data from twitter, facebook etc… and senses your mood, then recommends songs or plays them for you… so let’s say i mention ‘happy’ on twitter… happy songs are then played to me perhaps using last.fm or something like that. i could then rate songs and categorise them and over time, i’d build up a huge database of favourite songs which are played to reflect my mood.