Any recommended forums/wiki/blog s/w that uses PostGreSQL?

I've been trying to setup a collaboration site, ideally I need forum+wiki+blog
integrated functionality access control.  Specificly either the wiki or blog
need to be over viewable to members of certain groups.

I'm used to phpBB for forum software and it seems to have nice support for
PostGreSQL.  I tried out about 4 wikis last night, most had extreme bugs when
using their PostGreSQL code instead of the defauly MySQL.

Anyone have any suggestions?

Thanks,

Eric