All Web 2.0

Google Buzz

Google Buzz is a social networking and messaging tool from Google, designed to integrate into the company's web-based email program, Gmail. Users can share links, photos, videos, status messages and comments organized in "conversations" and visible in the user's inbox. Buzz enables users to choose to share publicly with the world or privately to a group of friends each time they post. Picasa, Flickr, Google Reader, YouTube, Blogger, FriendFeed, identi.ca and Twitter are currently integrated....

Facebook

Facebook is a popular, free-access social networking website that is operated and privately owned by Facebook, Inc. Users can join networks organized by city, workplace, school, and region to connect and interact with other people. People can also add friends and send them messages, and update their personal profile to notify friends about themselves. The website's name refers to the paper facebooks depicting members of a campus community that some US colleges and preparatory schools give to inc...