I'm sure a couple people have managed to house them together, but I've learned from being on this site (for almost 3 years) that a lot of newbies say this and then in a month or a year almost all have come back and recanted.
Snakes get no benefits from housing them together, and they thrive exceptionally well apart. Why would you even want to risk it? I look at the big breeders and successful small time breeders, who house their animals separately. If it was such a great thing we would see them reduce their cost for housing by housing multiple snakes together, but they don't.