The good new is that jQuery UI - 1.7.1 is out... and things are looking quite well. But still lot more to go. I am still waiting for lot of official UI widgets and Navigation or Context Menu are in that list.
I know discussions and planning are going on the Wiki and I know everyone will have a wishlist like I have. There are lot of options available as an plugins but having them in official UI bundle is a more better. UI Team must be working hard and there is lot of things which needs to be done.. All the best to jQuery UI team for bringing in Good for the future.
I have some complaints as well..but may be sometime later.