I'm currently taking the CIT4E. Let me tell you that some of its questions are absolute DOOZIES!
Enjoyable test with some fun/great logic to play around with. If you're curious about how to take the test, you'll have to look up the Glia Society and register for their newsletter. You'll get a link to the tests.
The test is not free. It costs something around $20. I was lucky enough to have a friend give it to me as a gift (I did not ask him for it). Furthermore, unless you want to waste your time and money, I suggest taking the GRIT (for free!) before you take any of the other tests. Some of the problems are simply impossible to solve unless you can score in the upper ranges of the GRIT.
Back to being dead tired.