Gtriage – See the Mesages That Matter in Your Gmail Inbox
http://www.gtriage.com/

Create an account by clicking the sign-up button. Then login to Gtriage for the first (and possibly last) time. They scan your account to figure out what is important to you. Then they create a Gmail label called “Important!”. Then they automatically label messages that their machine knows are important to you! (and it gets better over time). This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.