Here are a series of real IQ tests you can take. (You need Flash installed).
http://www.highiqsociety.org/flash/nonmembers/iqtests.htm
The funny thing about that online I.Q. test was that I thought it was just a silly, fun way to pass the time and put no real stock in its assessment abilities. I was rather stunned when my score popped up as 136, because that's exactly what I scored 28 years ago, when I took a real I.Q. test in college. Either an odd coincidence, or whoever writes them tests is dang good!