Is there any way to upgrade the hd100 to the latest versions? Some kind of reselling program, some arrangement with jvc? I'd like to do overcrank 60p with the latest ones and make use of all their other magic. Is there a way to trade in or upgrade through somewhere at a discount?

Stupid question here...

But what do you mean "overcrank 60P"?
I have the 110U

To overcrank implies recording frames faster then the intended timeline.

So, if you shoot at 60P and place your footage on a 24P timeline, you will get slow motion that is 60% slower than the original 60P recording.