That's great news! When I was watching the Super Bowl there was an ad for the Disney/Pixar movie Wal E. It began with Buzz and Woody eating popcorn on the couch and I thought this was an ad for Toy Story 3. After I saw it was actually for Wal E I was disapointed. Well, at least Toy Story 3 is going to be made.
I have developed a plot idea I think would be cool. The movie could begin with Andy as an older teenager or young adult, and he could sell his toys on ebay to a collector.