I left the gate to my office open, and when I went inside, I noticed my Return key on my MacBook was broken. I think my 1.5 year old got to it.
I read online that it's best to just bring it in to the Apple Store. It turned out that there was a small plastic part that was broken. They have a drawer full of keyboards which they use to replace broken keys. However, the Apple Store near my house didn't have the right keyboard.
I went to five Apple stores in all, and none of them had the right type of keyboard. Somehow, my 2008 MacBook is different than everyone else's. The person at the fifth store checked, and my warranty had expired just two weeks earlier.
The guy at the "Genius Bar" said, "I'm not going to petty. We'll fix it. We'll just replace the whole top case." The top case includes the touch pad, etc. and costs about $150. I gave him my laptop immediately, and picked it up four days later.
In the past (about five years ago), I had some really bad experiences with Apple support, but this experience was radically different in a whole range of ways. All I can say is:
Apple, thank you!