I must have misunderstood your post. I thought you were asking if anyone has used Bruce Clay's paid LinkMap service, which just checks the IBLs that the engines think exist.
Coincidentally, I just replied to a post in my forum - part of it was about checking on the IBL side of reciprocal links. Apparently, existing tools check for the links on the pages where they are thought to be, but sometimes the remote webmaster reorganises the site and moves the links onto another page and, although they still exist, the tool will report them missing.
The person I was replying to would like a tool that looks for the links on the remote sites when they aren't on the pages they were supposed to be on. Anyone think it's a good idea? Anyone think such a tool would be worth buying at, say, $50? Anyone see where I'm going with this?