Ok, maybe this isn't a huge trick, but it's the first one he's picked up and does all the time now. With or without the clicker.
http://www.youtube.com/watch?v=jv0Mctxg4Js
Been trying to get him to wave for a couple of weeks, but he's having a really hard time with it. Also working on getting him to let me hold his wings/touch underneath (for the eventual harness). That one he gets kinda angry about though.