Jacob Nielsen single-handedly takes on the 2.0 movement saying:
"they should get the basics right first"
(I agree, most sites including 2.0 ones don't get the basics right)
...and goes on to say:
"Most people want to get in and get out"
(I disagree and wonder if Nielsen uses social media Web apps at all)
Read the related BBC article and also take a look at Navigators, Explorers and Engaged Participants. (image below)
PSFK is having another conference--this time in London. Here are the speakers:
The Community According to Mack
Mack Collier of the Viral Garden provides a nice community roundup of various marketing bloggers.