According to an interview here:
http://moviesblog.mtv.com/2009/04/13...an-first-film/

Bay has mentioned that TF2 will run four minutes longer than the first (making it 147 minutes long), and states that the running time is now locked in.

This doesn't mean the movie is completely finished and done. But it does suggest that it is close, with things like sound effects, voice recordings and minor visual effects as the only things left to be done. It probably means that all scene placings and footage allotments are now done.

Hopefully that means there won't be any last minute issues or delays, and maybe it might just be ready for BotCon.
Or an advance screening in Oz again...