From
The Official Star Wars Blog:
"If you still need a good reason to see the new
Star Trek movie, this may be it. R2-D2 is in the movie as an Easter Egg, and if you can figure out which scene our beloved astromech makes an appearance, you should enter the “Star Trek Easter Egg Sweepstakes” on Facebook!
Get more info here:
Star Trek Easter Egg Sweepstakes (via Facebook)"
Update:
Via
The Official Star Wars Blog/
Star Trek's Facebook Page:
"R2-D2 LOCATION ANSWER (**SPOILER ALERT**)
During the Drill Machine sequence as the Enterprise comes out of its barrel [roll] amidst destruction of the other Federation ships above Vulcan, we cut to an interior Enterprise bridge over the shoulder of Kirk that is looking out through the front viewscreen. In space, R2-D2 is floating in the debris from about the top middle of the screen to the bottom right."
See also:
You Got My Star Wars In Your Star Trek