Twitter Spam Mass Unfollow Tools

OK I am getting to much Twitter Spam. I was using tweetlater to auto follow back. This seemed like a good idea at the time. Well that is turned off. There is just too much noise on my twitter stream. So what am I doing about it? There are a couple of tools I am trying

Right now I am loving http://www.twitblock.org/ it scans for potential twitter spam and makes it easy to block them!

I am also using http://untweeps.com you can unfollow people who have not tweeted in the last 30 days, you are not having a conversation with them.

If you know of any other great tools let me know I would love to here about them and share.