Today, more info was announced about the re-releases of Toy Story and Toy Story 2 into theaters. What was already known, is that 3D is involved, and they will be released on October 2nd, 2009 and February 12, 2010 respectively.
New details announced today are that there will be re-rendering, and freshening up of the original features so that they will match the detailed 2010 release of Toy Story 3 (which will be released in standard and 3D formats). Another note about the re-releases of the first two Toy Story flicks, is that, thankfully, no new footage or gimmicks will be added to the classic films; they are exactly the same as you remember, except that they are crisper with more detail, and they jump out of the screen at you. As put by Jim Morris, "There’s no new shots. There’s no new nothing. It’s exactly the same movie you saw before."
Another topic mentioned was the possibility of an IMAX release for future Pixar movies, but they say that they "never had it come quite to fruition", which means they are not planning on having it anytime soon.
Here's a great, detailed interview on the topic.
I can't wait to see these classics (and soon-to-be-classic) in 3D! In fact, 3D or not, I am just excited to see these features in theaters again. Only another year till they start to roll out!
UPDATED: Read this to read about the new re-release dates!