I would say that link exchange is something tricky when it comes to getting equal links. Usually you would want to set-up an even "trade" with the site you're exchanging links. Usually the links are on a directory/resources pages structure that have other links on it. That means that the
PR of the page is split between the links on it ... and if the list is pretty long, parts of the links are not even parsed. Also, the page can have, let's say, 3 links when you initiated the link exchange in order to get to 100 links in 2 weeks ...
So, do you guys take in consideration these aspects when starting a link campaign? What software do you use to verify that reciprocal links aren't deleted after a few days.