Connecting multiple VB installs via a bridge?
 

I know there are a lot of people who are interested in connecting multiple VB forums to create a network of sorts, allowing users to retain the same login etc. across all the sites. The only solution to this I have seen to date involves a massive amount of hacking of core files.

Would it not be possible to do via some sort of bridge, the way Photopost, VBAdvanced Links etc. work?

I am not skilled enough to know the how/why this would not work but thought by throwing it out there is may spark an idea in some coders heads.

I am about to launch around 5 sister sites to my forum and am just deciding to start them with a zero user base and have people re-sign up. Sucks but I don't want the nightmare of 2 day upgrades because so many core files are hacked apart.

Thoughts?

This would be very useful. I've heard people talking about this before, but I'm not sure if an addon has ever been made before.

No addons exist, I've exhausted my search for a manageable solution and one doesn't exist (without severe hacking). I saw hints that VB were possibly working on something but that could be 2 months away or 2 years. When I installed Photopost and saw how it utilized the VB user base it made me think why that couldn't be done somehow with multiple VB installs (except on different domains).