The attributes of the ui parameter are documented. The only attribute seems to be item, which appears for the blur, focus, and select events. It is a jQuery object containing the currently active menu item.
@kbwood.au: Thanks for your reply. I must be confused. Where did you get the .text() attribute from? That's the doc I need. All I want to find is the current index that was selected so I can make a switch statement. Any help is greatly appreciated.