I highly recommend looking into something like GetSatisfaction. It's an excellent place for idea submissions, tech support, questions, and to hear what your players love most about your game.
Good ideas get noticed based on popularity, not when they were posted. In forums, good ideas may be popular, but will get drowned out by more ideas coming in and eventually buried in the past.
Popular problems also get noticed quickly, and the most helpful solution gets nominated and appears directly under the topic, similar to Yahoo Answers, only better.
If you're curious to what GetSatisfaction looks like, check out the Cobalt page:https://getsatisfaction.com/cobalt
I used it for a long, long time, and it's an excellent website, and would REALLY help out the community here, especially because we're growing quite a bit!