We've probably only scratched the surface of what we can use jQuery for. It's likely a place that we will keep growing into.
A solid JS core library.
MediaFirst PR - Atlanta
Drupal JQuery for UI.
Opstax .com Brochure Website
The Opstax website uses some jQuery for effects and functionality.
Used on the landing page.
The best known DOM manipulation library we know of. Still not a silver buller.
Also, its Deferred object is very useful.
As all html dom manipulator