I'll add that as an idea. :)
Hmmm. That sounds like a challenge, can I get my implementation working first? ;P
It is on my list Marko. Probably be the next thing now that the wishlist stuff is done.
The difficulty is to find the forum URL for a given game.
MaGog has already solved that problem, using a very complicated heuristic (which needs very occasional handholding). You can take the forum URL from MaGog and just display it.
The field is called, believe it or not, "forum". There's also a "forum_tbd" field, which if true means there is no forum yet.