Briefly: Amazon.com has just put up their pre-order pages for the Toy Story 3 and Cars Toons DVDs and Blu-rays. They are all set to come out on November 2 later this year.
For Toy Story 3, there are currently 3 announced versions: a basic 1-disc edition, the 2-disc Blu-ray version, and the ultimate 4-disc combo pack with everything (including a digital copy). I like the 2-disc Blu-ray cover the best, but will definitely go for the full 4-disc set.
In addition to this release, Cars Toons: Mater's Tall Tales is also coming out as a Blu-ray+DVD combo pack this November. The set will include nine Cars Toons, including two never-before-seen shorts, Mater Private Eye and Moon Mater. I'll definitely be ordering this one, too.
Source: DVDizzy.com, The Pixar Blog