I don't believe there's been any further developments on a vB CMS module for the Arcade.
The vB5 version of the Arcade has tons of deployable modules that you can put anywhere on your site, though vB4 is way less capable in terms of customisation.
Thats too bad. vb5 is nowhere close for me to switch sites over to. Hopefully someone will come out with something for people to use. Just really need the vbarcade forum blocks to be able to be made to work as widgets, but not experienced enough to figure out how.