All this could be consulted with people who do xxx seo, I am not sure... Good programing, good seo knowledge, base it on this advice.
Linkspun screenshot
In general, it would be a program for off-site seo / link exchange, and it could manage 100, 200, or 1000 separate domains (of the same person / company). As long as this would not interfere with Google.com, and other search engine websites (and there is probably a way to do it, so it does not), it would be a very good and useful script (as long as links are important for seo, and they probably will be, for quite some time).