If the course is still ongoing, you can register for it at:
https://ikn.army.mil/
Look on the front page for a link to the Combat Tracking Course. Their website has a page which you can use to register for the course. I don't know how that works as far as getting funding or permission from your unit; as far as I'm aware, the course is not in ATRRS. My NG unit told me that I could go, but that I would have to submit a memorandum explaining why the training should be funded, and get State approval.
I have heard different things. A while back I was told by someone affiliated with the course that the funding was not in place for FY 11, and that they weren't sure whether the course would stay, move to a different location, or go away. I have tried calling down there several times over the past few months, but have not gotten a definitive answer. I do know that as of a day or two ago, their website still did not show any classes scheduled going into FY 11. This may not be conclusive, but it doesn't seem like a good sign.
I, for one, REALLY want to go to this course if it continues. If anyone has reliable information on what is going on with it, or finds anything out, please post it here. I will probably call down there again in a few weeks, and if I find out anything useful, will do the same.