There are two more episodes of MAD MEN on the first disc, and I'll likely watch both of them tomorrow afternoon.
BTW, the audio mix on the Blu-rays is DTS-HD MA, what I'd call REAL overkill for a show that does a lot of talking. Nice to have the lossless soundtrack (and the period music sounds great piped into the rear channels), but it really seems like they've gone all out for this season 1 release.