John Guastaferro has some nice walkaround card effects on his BrainStorm DVD set.
Also consider an in-the-hands triumph, ACR (of course), multiple location...
You can use the spectator's hand as a platform for many effects, so you can actually do quite a lot. I neat concept is to do a trick which requires a small number of cards, handing the deck off to a spectator, and then use the same spectator's hand as a platform. Because their other hand is full they can't really interfere with the cards on their hand.
Challenge yourself to come up with in-the-hands effects and see where it leads you!