Jquery team has released final version of Jquery Mobile 1.1.0. 

jQuery Mobile is a touch-optimized web framework (additionally known as a JavaScript library or a mobile framework) currently being developed by the jQuery project team. The development focuses on creating a framework compatible with a wide variety of smartphones and tablet computers, made necessary by the growing but heterogeneous tablet and smartphone market. The JQuery Mobile framework is compatible with other mobile app frameworks and platforms such as PhoneGap, Worklight and more.

[Wikipedia]

Jquery Mobile 1.1.0 improvements  are true fixed toolbars, completely re-vamped animated page transitions and AJAX loader, refined form element design and feature set, and improved documentation

Read through the release announcement http://jquerymobile.com/blog/2012/04/13/announcing-jquery-mobile-1-1-0/  for more details on this updated release.