Hi, at the SuperTuxKart blog we often get valuable feedback and also suggestions open for discussion, but as a blog isn't really suited for discussing things we might miss out on some ideas that just needs refining. Many doesn't seem to want to register at yet another place, which is why OpenID integration would be nice to have for the forum. There's a plugin for it here: http://sourceforge.net/projects/phpbb-openid/
Another thing to mention is that we'd like to have per-forum feeds enabled, so we can have a small gadget showing the latest SuperTuxKart-related forum posts on the side column of the blog. This would be to raise awareness of the forums, making more people join the community here. According to http://www.phpbb.com/community/viewtopic.php?f=46&t=2029415, it's just a matter of enabling it in the control panel.
Hopefully you'll take these suggestions into consideration.