link exchange script on getafreelancer
 

if anyone is interested:
http://www.getafreelancer.com/projects/183139.html

the person I originally awarded this to isn't answering e-mail so it is open again.

AXLinks can do that, and it's free.

I've also written an A-B/A-B-C link script, but it's SQL based and I want to rewrite the old system to use my new captcha and spider/tracker.