Via Kevin Drum (who worries that the web is becoming too smart) I’ve found The Typealyzer. You tell it your blog’s URL and it does a Myers-Briggs temperament sorting thing. By its reckoning and based on the Nutshell, I’m an ISTP… which gets three out of four right, but the wrong letter is very, very wrong indeed.
Of course, it’s always been my conceit that this me — the writing voice that I use, the one that you’re reading — isn’t the me of the outside world. As such, perhaps this isn’t an absurdly wrong result so much as a reflection of how I construct this particular version of myself.