Ample Green Foundation

This site allows you to add hundreds of friends.  Be sure to check out the new feature that they added that allows you to add friends that have the same interest as you do.   You can not go wrong by rushing over to http://twitterfriends.org/ today and signing up.  I gain over 100 new followers every time I log in and the best part is that the admin gives credits out from time to time in order to keep things rolling.