Google has recently launched a new lab feature called Google Follow Finder which can help you find those twitter users who have a similar followers like you and other twitter users whom you should follow on twitter as suggestions.
If you see someone you want to follow, just click “Follow on Twitter,” log in, and they’ll be added to your following list in Twitter. This integration is based on Twitter’s new @anywhere frameworks, which make it easy for any site to add Twitter functionality. We’re using the frameworks to provide dynamic information about Twitter accounts and one-click following.
Check out Follow Finder By Google