Geeklog.net forum is using the latest code found here:
http://code.google.com/p/geeklog/
Forum 2.9.0 has not been officially released yet as there are a few more bugs we want to fix (but people are more than welcome to try it out as is). We were planning to get Geeklog 2.0.0 out of the door first before finishing up the forum release.
One of the Geeklog Core Developers.