There are some much better programs for this like http://twollow.com/, but if you are are programmer that uses powershelll then you might really enjoy this.

I don't believe in the whole auto follow thing, but hey it works for some people....

All you have to do is copy and paste the below script at a PowerShell prompt – change the Username and Password first! When it runs it populates two arrays $notfriended and $notfollowed (just type the names at the prompt to list their contents).

There’s an example at the end (commented out) of how to iterate over the $notfriended list to add the people who are following you but you’re not yet following.

There is a rate limit on the Twitter API. If you have *a lot* of friends / followers, you may hit it. The call to Get-TwitterLimitStatus gives you a short summary of your current limit status.

Usual rules apply, no warranties, limited testing, limited error handling, use at your own risk, yadda, yadda, yadda…\

Come see his post at

http://blogs.msdn.com/mikeormond/archive/2009/02/18/twitter-script-who-s-following-you-or-not-following-you.aspx