Whenever I teach my classes, one of the common questions I receive is about seeing what other people are doing. IOW, are there some sample, production sites out there that we can look at and learn from?
I don't know about the production part, but I can give you a couple of links to some sample sites:
http://www.wssdemo.com/default.aspx and http://www.sharepointshow.com/default.aspx. In addition, you can look at the registration pages for www.mindsharp.com, which are writing back to lists in WSS.
Bill English
Mindsharp