ICSP wireless?

[skimask]

Wireless boot-loading is easy. It's not cheap though. Wireless in-circuit programming would be a nice challenge.

There ya go, Easy and Good, but not Cheap.

If the receiving circuit already had it's own power, should be a piece of cake to add a small boost converter for Vpp unless of course the PIC had been CONFIG'd for LVP in the first place.
I didn't see any bi-directional modules on your site, but I'd guess a 'speak only when spoken to' type setup using the modules on your site might not be out of the question.
A wireless module that would, in essence, sit on the ICSP pins like a PICKIT2 does?
This sounds like a bit of fun...except that a person is reinventing the wheel...with all of the various programming spec's out there for the PICs.