Is there some sort of season pass I can get for Amazon?

There is: http://www.amazon.com/Inside-Mad-Men-Look-Season/dp/B00C1J0580/ref=sr_1_4?ie=UTF8&qid=1364928975&sr=8-4&keywords=mad+men+season+6

iTunes also has a season pass up (link), if you prefer that. Episodes on Amazon and iTunes are available the next day (Monday), usually every morning.