Ah, nothing like a new program to start the morning off right. Kellogg's Family Rewards appears to be your typical, "enter codes, earn prizes" site. They were good enough to send me a free code, as well.
I say "appears to be" because, in typical big company fashion, they screwed up the website and nothing is working. I keep getting the "We're sorry, there was a problem with your request. Please try again." message, which is code for, "We got a drunk teenager to set up our site for us and now it doesn't work."
I'll try again later.
Edit: It's working now, albeit VERY slowly. On the plus side, we have a pair of three year-olds who go through cereal like a hot knife through butter. On the downside, we just buy whatever's on sale.