My Favourite Twitter Tool for Friend-Finding: Summize
Summize Twitter Friend Finder
On the Summize site you can search for any term or phrase and see all the twitts that include it. You can filter by language, people, attitudes (positive :-) or negative :-( ) and also translate twitts in other languages to English.
You can also subscribe to a particular term/phrase’s feed thus saving you the time of having to go to the Summize site. Summize also allows developers to use their API and integrate Summize’s search results with their own apps.
For example, I have a strong interest in "The Secret", and "The" as well as struggle terribly with "Drupal".. so I want to find those kinds of people to follow :)