According to Variety, Pixar debuted their teaser trailer for next summer's Toy Story 3 at the NAB Show in Las Vegas. As is their tradition, this first trailer has no connection to the final movie, but shows favorite characters Woody and Buzz in a short comedy skit. No doubt we'll be seeing this in the theaters very soon; Up is the most likely candidate.
From the Variety article:
Walt Disney Studios Motion Picture Group prexy offered up the first-ever public screening of the teaser trailer for "Toy Story 3." Custom-animated short shows Woody supervising the Toy Story characters as they improvise a sign for the pic, only to have Buzz upstage them all with a high-tech version.