6
koudanshi has said before that if there was enough interest (there's interest from some but not enough to warrant all the work needed) or if somebody would pay the license fees etc, then he would integrate VB with xoops.. but he wouldn't do it for free, it would be like the new IPB v2.0 and have a fee to download it because of the nature of VB not being Free..
i think he charges $10 - $20 for the IPB script + you need to buy an IPB license too from invision..