Yep, very intrigued if official Kindlet runs, because...
Code:
java.lang.IllegalStateException: Unknown Kindle device: A3I3CR3NPZFVHY
And AFAIR from the whole 3.X-on-DXg thing, the device check is handled on the firmware's side, not the Kindlet's. Hmm.
So, yeah, if anyone with one of those new 4GB PW2 can get his hands on an official Active Content app (which probably implies a US account), I'd be very curious to know what happens

.