I am planning to build a site using EE instead of waiting for EE2.
However I cannot choose between already established Vbulletin forum and switching to EE forum addon, depending on how EE2 changes the forum addon.
Will you release a new forum addon that requires a import process instead of a regular upload and overwrite update?
One thing to consider will be the differences between vBulletin and EE Forums. I put up an EE site a year before the EE Forums came out and was ready to go with vBulletin. Rick Ellis said it was a good choice, but if I waited awhile (a month) for the EE Forums I would not be disappointed. The EE Forums went up over three years ago and it’s been rock solid. There are differences in features between the two, of course, but none that seemed to matter to the forum members. Having full EE integration is a huge plus. On one forum install we run the EE Forums through the templates engine which adds all kinds of additional flexibility.