Test is here: MBTI Prototype
After trying it out, please post feedback The more the better.
Important note: I will be updating the OP periodically with updated tests based on feedback. After a certain amount of time I will be locked out of editing the OP, so if the OP hasn't been updated in a while, check the newest posts for updates.
12/03/2009 - changed the wording a bit (x3)