SocialText 2.0 has not much to do with the Web 2.0 hype, but within my interpretation of Web 2.0 - to make things it easier for the people use / utilize - it has ...
Marshall Kirkpatrick had a look on SocialText 2.0 and wrote on TechCrunch
'SocialText Aims For Wiki 2.0'
Announcment and test offer from SocialText
ScreenCast on Socialtext from Ross Mayfield (Quicktime)
(As SocialText was my first live intro into this world, I thought I should mention it here ... and the new version looks damned good, too.)