I've used both ibProArcade and v3Arcade in the past for my forum. I have yet to install an arcade after an upgrade to vB 4.x.
I was ready to install v3 and then was notified that DragonByte will be releasing their new "vBArcade" at the end of the month. I don't, necessarily, have any allegiance to them. I just wanted to get your take on their new project. (I am still leaning towards v3Arcade since I don't want to wait till the end of the month)