Well, it's all personal opinion. I wouldn't put too much stock in my rantings!
BBPixel does a fine job at bridging a single J!/vB install on the same server and same db.
I just had some issues with it early on, and kinda got put off. But the current version is supposed to be a lot more solid.
Note that they will not be officially supporting vB 3.7 until it goes gold. It should work, but no guarrantees.
-- hugh