Any mod can come over and begin testing the functionality of the vB install.
http://vb.twoplustwo.com
There are a couple things you should keep in mind. First, the issue of skins and style is mostly being dealt with last, although Kiera is currently working on a couple skins that approximate popular UBB styles. For now please focus on how the software is working. The sidebar isn't currrent, but that's a minor thing that will be addressed soon enough. There are going to be a couple other small configuration issues you'll notice. Don't assume anything is final.
For today I'd like it if you guys focused mostly on things from a user perspective than anything involving mod powers. It's also probably safe to disregard the few old testing threads that exist in there and start new discussions.
Finally, as the info used for this install is several months old, a few of you may not be able to sign in and view the test forum immediately. The best way to handle that is to contact me privately.
*edit*
Separate login and display names don't exist in vB, so you'll need to use your display name to sign in. I had already planned to announce this to all users in advance of the switch.