MsgFiler 2.0.4 was released a few days ago. It’s compatible with Mac OS X 10.6 Snow Leopard. There were a lot of behind-the-scenes changes to how Mail plugins work, and with the help of a number of people (thanks Steve, Scott, Dane, Joar, and more), I was able to get MsgFiler updated right under the Snow Leopard release date today.
If you’re looking for a fast way to file your messages, look no further than MsgFiler. If you require more significant control over processing your messages, take a look at Scott Morrison’s Mail Act-On.