Check out the link that Hugo posted above. It looks like it has pretty good instructions and most of the protocals are standard so you don't have use much custom stuff. Personally, I would probably use FreeBSD or Mac OS X as my server. However, I am probably going to wait for version 2 of this type of product. The prices seem high for what you get and I would really prefer to use 802.11 (no Cat5 in the living room yet, and I was trying to keep it that way).

-Mike