Actually, i would prefer a separate website.  The people working on LuxPose would have better control over the forum, for instance.  Although the wiki here is good, providing it is updated.  Though it is still in a third parties hands. 

I also agree that there should be separation of dev and general posts.  If this was set up on a new site, it could be that only the devs would have post priviledges on a particular thread, or sub-group, while everyone else could be read-only. 

Just my .01 worth.  (Inflation, bah!)