"Element BB is a forum for postnuke heavily inspired by Vanilla forum.
The goals of this project was to create a very simple, very easy to use, easy to impliment, web standards compliant, accessible and usable forum. I felt that Vanilla meets and often exceeds these requirements which is why I chose it as the model to develop from. Please note: this application was built from scratch, it has no relation to Vanilla aside from its appearance and some of its available features." -- invalidresponse.com
ElementBB will be released under the GPL at version 1.0 has now been moved to the NOC. So download the module, test it, create translations and give feedback in the project trackers.