So this web site has quickly become my favorite source of hard-core technical reading material covering a wide range of topics (from rootkits, to patchguard and now pwning OSX). In fact - I will admit - I favor uninformed.org over just about any other on-line zine (phrack, Wired, etc. etc.). It is by far my favorite reading these days.
Anyhoo - Maynor has an interesting write-up (that I hvae yet to read) covering his adventures in pwning OSX last year (he was apparently under an NDA that prevented him from releasing details until now). There's also another write-up on Patchguard and a write-up on kernel mode stealth techniques (i.e. rootkits) that's probably better than what will be in my upcoming book chapter on the topic. :)