I would be interested in starting a simple word association game myself, but I'm afraid it'd get buried/overshadow a useful thread because there's no real specific place to put it. However, it also doesn't seem too fitting to throw in a whole subforum for a couple forum games, is it? I don't know how popular/varied it'd be in a place like this.
Forum games are real popular in lots of game forums, there are always some subforums dedicated to it. There are loads of varieties of forum games though...
Fully aware of many different forum games, as well as the environments of forums you see them in. I just don't know how well it'd go with this one. It wouldn't hurt to try, I suppose.