Apparently Sterling Cooper Draper Pryce isn't progressive enough for a gay art director: Shooting for Mad Men season 4 starts in March, but Bryan Batt says, "I was supposed to be notified by December 31, and nothing." [TV Guide]
This gives me a sad. I love Salvatore, and it was nice to see a smart, savvy (albeit understandably self-loathing) gay character on a great TV show like Mad Men. Plus, why wouldn't they bring him back? They have the perfect opportunity what with the new agency starting up.