Just because it's 1.33 GHz doesn't mean it's out of warranty, not to mention the fact that he said his warranty goes for 2 more weeks. They were still selling 1.33 GHz 12" PBs until January of this year. I got mine last October.
Anyway, seeing as how you're under warranty, take it in. It might be a good idea to buy AppleCare while you still can. You can buy AppleCare anytime within the first year.