jQuery UI Datepicker includes a very versatile, fully i10n'd and well-tested date formatter.
It would be very useful for other date-formatting needs, too. Unfortunately, the dateFormat() method needs an instance of a $.datepicker, which makes stand-alone usage impossible.
It would be great if you could rebuild the datepicker plugin in a way that the date-formatter can be used seperate from the datepicker widget.
The date formatter could then be something like
DateFormatter = function(Date)
// do formatting
var df = new DateFormatter(new Date(1323870924000));
This could be shipped within the jquery.ui.datepicker file. This way, it wouldn't make a difference for people upgrading, while adding a massive benefit for users who need a standalone date formatter.