...but who knows when the new season will start? It's only been a few weeks since the third season finale, and I'm already showing signs of withdrawal (plus Lost doesn't start until February 2nd).
As a public service for those who are similarly afflicted, I've compiled my favorite recent(ish) articles and websites about Mad Men:
Mad Men Footnotes (Oh yes, I see me wasting many hours here looking at vintage ads and newsreels)
Vanity Fair Sept. 2009 Feature (many pretty pics)
Daily Beast Interview with series creator Matthew Weiner (discusses the finale in depth)
Politics Daily (humorous wrap-up of the women of Mad Men, and where we left them at the end of this season)