If my memory is working properly, x10's in the process of migrating to a new host. As such, certain features are still not working properly - the one I know about is the ad code (both advanced and corporate aren't displaying at all, because the code used to display them is calling a certain url, which isn't working because the server's still being moved).
My best bet is the creation system is down along with the advertisement server. A while back when I was tyring to get an account, the same thing happened once or twice throughout my registration period - the server was having issues, so it wasn't running the creation script or whatever, hence not clearing out the list of people who already applied.
Once they get that particular service up it should start working again. Worst case scenario is you'd have to wait for it to reset later that night (it might still have you in it's database of users waiting to get drawn in the lottery, so it'll need to run said lottery before clearing you out).
In the mean time, try not to panic (!), it's all in an attempt to make x10 easier to use, and more stable.
