I've configured 3 new websites for WAPA.
This was actually very easy, about 1 hour of tinkering. We just "cloned" the whole GeekDinner Xen virtual server and added some new skins.
Now we just need to migrate the content from the current Joomla site to WordPress.
Joomla is not bad. But I think it's just a bit too complex a machine to drive if you "just want to get something done".