Cool. Looks like the HTC Touch Diamond (and presumably the HTC Touch Diamond Pro) can actually do multi-touch.
Not only multi-touch on the screen itself, but all the way down around the navi-wheel and buttons. [Update – Apparently it’s just around the navigation buttons that the multi-touch works.] The feature is revealed when using HTC’s Nav Debug Tool but so far doesn’t have any practical use beyond simple testing. However, HTC updates its ROMs on a fairly regular basis so maybe we’ll someday see this feature come to light for normal people like you and me.
Here is how it works:
* The area around the navi-wheel is actually a capacitive touch-area with multi-touch
* it may allow using finger pinching gesture and finger spreading gesture (zooming for example) and also implement 2 finger moving for panning gesture for example too.
* Not all capacitive touch-areas are multi-touch at the same time!
* You can try it for yourself at XDA-Developers NavDbgTool.exe, you must have registered account there in order to download