Ipersonic is retty much a watered down version of the MBTI. It's a lot more brief though which is probably better suited for most people doing things on the fly but probably more inaccurate because it's so short. It has 4 questions that concern the MBTI dichtomies so it essentially is an MBTI test, hence why the prefix says MBTI.
Here it is; http://www.ipersonic.com
Post whatever you get!