I'll get someone to put a document together for us. The most simple way is to use your home computer. In the vidalia settings you can click "sharing" and then "Relay traffic inside the Tor network". Your home IP address would then be in the public tor node directory. There "shouldn't" be anything wrong with this, but if you want to run one anonymously, you'd be better off renting a server and running the node out of a datacenter. I just put it on the to do list to make all of this really easy for you guys. It's fun too and nice to know that you are helping people in oppressive countries speak out and also helping people access Silk Road.