The first two online registrations managed to crash the Comic-Con website all together.
They're assuring people that this time their systems are prepared and will be able to handle all the traffic so you should be able to avoid any problems.
So it's time to set your alarms, strike out the days on your calenders, and keep an eye on your sun dials, and of course once Comic-Con starts, be sure to come back here for tonnes of pictures, videos, and all the good spoilers.
Click the source for the registration page.