Everything 2.0 has a pretty impressive collection of health sites with a web 2.0 twist (think social networking, wisdom of crowds, RSS, collective intelligence). Mostly medical but a few exceptions. Very nice to see PsychAntenna make the list!!). For those who like finding new and interesting sites, Everything 2.0 has links to over 7500 web2.0 sites. Phew, that is some serious cataloging.