Topsy is a new search engine released last Tuesday, which uses Twitter retweets as basis for returns. The concept is simple. Type in a keyword and Topsy returns relevant links in order of how many times they've been retweeted.
For example, I searched the term Twitter ebook and here's what returned:
In 2005, I had the opportunity to sponsor the country's first conference on business blogging, Blog Business Summit. The conference organizer was Steve Broback, CEO, of Parnassus Group. It was a ground-breaking event.