My guess is that there's no commercial support, yet a quite active community as you can see by the forum here.
If you require a forum with commercial support and nice features, I may have to recommend having a look at "Jive". Sadly it's quite expensive too, with yearly costs .. but you therefore have full support, and get patches right away with instructions on how to apply the patch to your system....
... if however you do have someone that is familiar with
java, I think the community may be suitable too. If you face an issue you normally get a reply on where to look within 24 hours ... But of course no ready-to-use implementation for your problem right away ;)
[originally posted on jforum.net by Sid]