jQuery UI was released last month and provides an official UI library for jQuery development. Included in the release:

• Mouse Interaction
  • Draggables
  • Droppables
  • Sortables
  • Selectables
  • Resizables
• User Interface Extensions
  • Accordion
  • Calendar
  • Dialog
  • Slider
  • Table
  • Tabs
• Effects
  • Shadow
  • Magnifier

Although many modules aren’t ready for primetime use yet. I would advise trying to integrate the official packages in your next jQuery project.  Over the next few days we will be exploring each of these elements in more depth.

• Getting and setting values for jQuery widgets
• Create Slick, Scrolling Panels with jQuery & Coda Slider
• jQuery Date Picker
• Get Ready for jQuery UI
• How to Write a jQuery Plugin
• Customized context menu handling with jQuery
• Helpful error handling in jQuery
• Custom stateful jQuery widgets
• Cross Site Scripting – the new old way
• Using the jQuery data method as a local datastore