Last week, all eyes were on San Francisco. Up north in Sonoma, the NewComm Forum debated how to incorporate social media technologies with communications (Step 1: Add socialTNT to RSS reader). Down in the city, the tech community rallied around the Web 2.0 Expo. But two years after Tim O'Reilly defined the emerging technologies, many are still left scratching their heads and wondering what the eff Web 2.0 is.In 2006, Tim O'Reilly, founder of top tech publishing company O'Reilly Media, gave his compact definition of Web 2.0:"Web 2.0 is the business revolution in the computer industry caused by the move to the internet as platform, and an attempt to understand the rules for success on that new platform. Chief among those rules is this: Build applications that harness network effects to get better the more people use them. (This is what I've elsewhere called "harnessing collective intelligence.")Now let's compare that to what top Bloggers Dan Farber (CNET News.com), Marshall Kirkpatrick (ReadWriteWeb), Mike Butcher (TechCrunch), Dean Takahashi (VentureBeat), Scott Beale (Laughing Squid), Josh Lowensohn (Webware). [Video duration: 3'23"]>>Continue reading >> Less