So I'm in the unique position of trying to learn jquery by means of using jquery ui widgets.  So a few days back I downloaded 1.8rc1 and was working off the demos at  http://jqueryui.com/demos/ .  At that time the demos for 1.8 were up, but it appears they've disappeared now.  No worries I thought, I'll just check out the docs.  For the most part this is an acceptable solution, but I've run into a blocker, for me at least.

I'm trying to use the autocomplete widget with callback functionality, but I'm not sure how to.  The docs mention that it is possible, but frankly, I need examples to work off of and they aren't there.  The demo at  http://docs.jquery.com/UI/Autocomplete is quite simplistic and so I don't have anything to work of of.  

Is there some place where the demos disappeared to or is there some more complete documentation elsewhere?