For some reason I want this version of BB to be voiced by Christopher Daniel Barnes.
Maybe its a Spider-Man thing, since Christopher Daniel Barnes & original Bumble Bee voice actor Dan Gilvezan have both voiced Spider-Man in the past.
In the preview scene of Sam and Bee in Sam's garage, you saw the clip of Bee mixing up a load of soundbites with his normal voice...
I'd like to see this be the way he communicates in TF3
^Well, it wasnt a plot-hole per se as they explained it in a prequel comic, but only die-hard fans are going to read those so they should have explained it somehow in the movie also.