It takes about a month for a container ship to sail from Indonesia to California. Not sure how long it takes to unload and clear customs & national security. Then trucked inland to Fender's distribution center in Ontario, Calif. August 12th is the anticipated arrival date at the warehouse.
Fender was obviously unprepared for the consumer response they've received for these amps. Luckily I have a practice BA 108 at school and a Rumble 150 here at the house to play around with. It looks like I'll have to wait.

I like the Rumble 100 very much with it's more than twice as much power and smoother sounding Eminence 12" woofer. The Rumble 40 is a good sounding little amp for personal practice. I wonder if you could work a deal to where you could have the Rumble 40 to use until the Rumble 100 arrived? Buy the 40 now and trade it in on the 100 later? Sure this would cost you some additional $$, but think of it as Rumble Rental 