If you happen to belong to a yahoo group or maybe have a facebook or myspace account, then this site might be of interest to you. The site is called Craftgate.
This site is designed with the crafter in mind and provides more opportunities to connect with like minded crafters around the globe. I did a quick search just for stamping and found 2 categories, including one for swaps, I was really interested in exploring the altered art links.
If you get a chance, check it out and let me know what you think.