[peyton]

Mike Ash's articles are the most in-depth I've seen.

http://mikeash.com/pyblog/

[sjtgraham]

Yikes, that index page is incredibly hard to read, the actual content pages are much easier to read though. Looks like a solid resource, thanks.

[perishabledave]

It's worth it to go through the archives of Friday Q&A on Mike Ash's site.