Well any support on new vb features as far as plugins would take some time as once we get a site setup using the new code we would need to look at what changes there are. Right now I am working with 2 betas so any plugin time I get would be in my free time. Support and Development take up a far share of my day.
We would eventually support any new vb feature we could but I can definately say if 4.2 is gold in a week or two any new navbar tab we would most likely not have support for yet. If it is a ways off it may be doable.