Ultimate- I have seen this hack on forums before. It normally is used with sites associated with one another. Maybe like thesitepeople with this site. Even so, the sites are very unrelated and if they wanted to hear news on TSP, im sure they would be more than happy to type that url into their web browser if they are serious about what they are looking for.

The sites that take affiliateing and partnerships to extremes usually use this feature with portals.