You can still get Apple Care through Apple if you register your machine online with them or call. The Geek Squad offers great programs, again, I sold two 3 year black tie protection plans with accidental coverage today, and yes, you have 14 days to decide. They'll run a diagnostic on your machine to make sure it's still tip top and what not, but honestly... I'd just stick with Apple Care. You don't really need what the Geek Squad is offering. Really their services are more geared towards windows PCs. The optimization and restore discs option is great for windows PCs (most of which don't even come with a restore disc anymore... how f'd is that), but they also offer a "Mac Optimization" also for 40 bucks. Being a life long Mac user and using OS X since Jaguar (10.2), I can tell you how I "optimized" my mac when I got it. I set up my user account... I changed my prefs to the way I like them in system prefs... voila... optimized. Maybe run a repair disk permissions just in case when I first got it. Either way, it takes a whopping 20 minutes to set up, and you're done...
In the case of black tie protection, if you're going for a plan without accidental coverage, there is absolutely zero reason to purchase it from Best Buy. If your machine does encounter some issues, you can either drive the extra 20 minutes to the Apple store (worth it to deal with people who actually know what they're doing since BB will ship your computer to Apple anyway), or send it to Apple yourself (shipping paid for). Apple's warranty is excellent. I've used mine several times (not even just the Apple care plan on my old G5, but just the initial warranty on iPods and this machine). They rarely ask questions, and will set you right right away. It's a great warranty through Apple. I'd buy through them.