IF YOU'RE UNLUCKY AND THE ABOVE TIPS DON'T WORK, KEEP READING...
I promise that I respond to every single e-mail that I receive about this stuff, and if you don't hear from me, it's NOT because I'm ignoring you!
I've had thousands of people register successfully, so this isn't a common problem - but sometimes people get unlucky... so...
If by some chance you
a) do not get a confirmation e-mail within 24 hours
b) you've checked your junk/spam/promotions folders and don't see the e-mails
c) you've e-mailed me to inquire about it and haven't heard from me within 72 hours
...your e-mail provider could be blocking the e-mails.
So, if this happens to you, the only solution is for you to either keep trying in the hopes that the problem fixes itself (it sometimes does), OR, try to register with a DIFFERENT e-mail address. Hopefully that new e-mail provider won't get carried away with blocking stuff that it shouldn't.