Okay, so over the weekend I managed to sell MBTI to an ISTP. He actually requested links.
In the past, I've linked people to PersonalityPage, but the feedback I have gotten from Sensors has not been encouraging, and I can't say that I blame them. The descriptions at PP are not only written iNtuitively but are also iNtuitive-biased.
I am perfectly capable of digging up other links that I could give a try, however, I figure I might as well ask the Sensors here what links you'll recommend. This is for a guy who is quick-witted but whose patience with academic abstraction is close to zero.
(iNtuitives, if you have personal experience with successfully introducing a Sensor to MBTI, I'll appreciate your links too.)