This morning the duders down at Google Labs released a neat little ditty. I don't know if you use labels already, but you should check out the smart label system. Labels gave you the ability to sort your e-mail into different tags based on regular expressions. It is implemented with some really simple pattern matching. Though with a little bit of computer wizardry you could sort your mail pretty well, it's not really all that useful with today's internet. Luckily, Google has our collective backs. These labels are actually pretty smart. I navigated myself to this link to turn on the service.