Mr. Tweet

Mr Tweet at www.mrtweet.net is another way of gaining new followers. All you have to do is follow Mr Tweet on Twitter and your tweets will be monitored for content and then you will get a Direct Message from “him”. You then go to the site and login and you will get a list of suggested people. You will also get a list of people who are following you that you aren't following so you can then follow them if you choose.
It's a really nifty little site and worth registering at.