Douptful.
Currently I'm the only one working on IMT stuff. And at the moment, "working" is hardly the words as I am stuggling to push my thesis forward and learn portuguese before leaving for Brasil.
It's about the same situation on the SentryStudios side, with the exception that I don't know of anyone working on INF 2.9 developement, although when I need some help, I usually get it very fast (thank you guys).
So, it is douptful that the two teams will ever join force (especially since there is no inf mod team left working on INF... I hardly make a team on my own). But, the still is a good collaboration between Sentry Studios developpers and myself. It just ins't official.
But if you are thinking to do what you first suggested, I doupt anyone will be willing to get into this kind of project (INF3.0 for UT), including myself.