I say we should just ignore the patent. I can hardly imagine some greedy licence grabbers sueing everyone who uses jpeg, whether the law on their side or not. Developers should download those jpeg sources before they are withdrawn!
In the end, the internet will again avoid the worst excesses of capitalism - and always will, because we who use the internet are free.
PS: I wonder if I could patent being American? Everyone American will have to pay me money, or they get called Mexicans. ;-)