I don't know if this helps you out at all, sortlinks, but here's what's on my blog.
http://adultblogfinder.com/blogtrade.htm It works somewhat like a toplist. Most recent referrer is on the top of the list, and gets bumped by the next referrer. Whoever sends you the most traffic stays higher on the list longer, and in turn has more likelyhood of you sending traffic to them. There is no cgi-bin/out or anything. There's just a small query string at the end of the url. You can see how it looks on this page in the side bar under "Hot Blogs".
http://www.camsexworld.com/blog . I understand you can set it up to trade with all the other blogs in the system, or niche specify your trades. So, It's not like a TGP trade script, but it's nice for a little extra traffic.