http://en.wikipedi...%29#Ownership_laws Technically it's a hybrid not a true wildcat. There are laws against keeping wild animals as pets but depending on the state you can get a permit if you are willing to pay for it that is.
A Savannah would be a kickass pet but I would never pay that kind of money for one.
My cats mother "Socks" was a feral stray but we're pretty sure she at least looked 100% domestic cat. Their father "Ghost" was a feral stray but he was like 1/2 bobcat so teeccchnically my cats are hybrids.