Way to Milk A Franchise: Real Housewives

so it's not at the level of VH1s "_____ of Love"s, but on Bravo Real Housewives of Orange County was pretty clearly derived from ABCs Desperate Housewives (which is a bit of a reference to Stepford Wives).  Following RHofOC was Real Housewives of New York, currently there's a spin-off of RHofOC... Date my Ex, and I've just learned that there's about to be a Real Housewives of Atlanta.  Anyone want to place bets on which city will be next?  Atlanta's cast seems more annoying than the past seasons, but several of them appear to actually be friends, instead of just being mashed together by the show as NY was.