both flash (cs5 +) and javascript have event handlers for multitouch events. So you could write your own falsh or js plugin. Concerning those events in krpano.xml, its not yet possible. But like doubleclick event wasnt possible either at first, there are always some workarounds.

Multitouch would indeed be nice. But you could still make plugins zoomable with a single finger tip and activate onclick-functions only when zoomed in. Just think outside the box
What I really would love to see for iDevices is the possibilty to scroll/move plugins just as smooth as on websites or in regular Apps. I wrote a plugin that allows to scroll and drag plugins on iDevices, useable for thumbnail gallerys ie. But the realtime calculation of the screen-position is far too much for the idevices and I doubt that krpano will ever be able to access the iPad-Multitouch Functions directly.
Let´s hope I´m wrong and Klaus keeps amazing us!

Best regards
Nupsi