A WordPress plugin to let users login in a no-refresh AJAXy manner, a la Digg and friends.
For all your AJAXy WordPressy needs.
Inline Ajax Page – WordPress plugin to do lots and lots of little Ajaxy tricks. Worth a look just for a live comment preview, if it’s any good.
Netflix/Amazon style star ratings with no page refreshes.
A bit of AJAX to perform an autocomplete function in a search box. Many, many places to use this…
Very cool little ajaxy widget pops up useful information about any member of Congress when you use a simple tag (a la Technorati or Delicious) and roll over their name.