A source sent me that info that may answer why there is no GH3 camera+lens kit in USA:
“Panasonic will be passing on kits for the GH3. However they will be running lens rebates when purchasing the camera, so it will offset the price to match what a kit would end up being priced at. As far as flashes go. There will be some new revamps to the line over the next year. The GH3 offers wireless flash control, so their line will be updated to include this feature more effectively.”
UPDATE: The flash he is talking about is the new DMW-FL360L that will start to be shipped form mid-December in Japan (Source: DC.watch).
EU, US and Canada links to the GH3:
All current GH3 auction on eBay (via Slidoo).