Thanks for the advice, everybody.
I'll check out both DirectNic and NameCheap.
Thanks for warning me about the patent, Tommy. I'd hate to be in violation! The check is in the mail - I've prepaid for 1000 sites in advance. Luckily I'll have a lot of money soon because I just signed a deal with this Nigerian banker.
You're in luck, by the way, as it's a little-known federal law that every check drafted on April 1 is worth twice as much!