The Hubstripping site is a great resource for learning about internal gear hubs, and connecting with people who can actually help you get one back on the road.
It was a great resource for rebuilding the Sachs Automatic I bought on eBay. Through the comments section, I met very helpful people. One fellow had scanned the original maintenance poster and put it on Flickr, and Jens at Scheunenfun.de sold me a replacement driving ring after I broke the original. Where else can you get something like that?
Apparently Marco has moved on to other things, and has put the site up for sale. I hope the new owners maintain and expand it. I wonder how much a site with 15,000 visitors a month goes for?