I will have to agree with Ace. The SF Bay Best Buy is not a bad store. I have made many of purchases at the Harrison St. location. For every one store like that,however, there are plenty of Best Buy stores like the one that is located near me here in PA.
Let's see. Within 30 seconds of walking in the store, you become a few droplets of blood with the sharks swarming. The Mac selection is limited to an iMac 20" and a MacBook Pro. You never quite see any salesperson go out of their way to point out that they sell Mac's. There are no Apple trained employees.
The accessories are quite limited. They do have a Wireless Keyboard on display. It has been fingered more times then Freddy

. The grime build up reminds me of the finest Comp Usa (RIP). I actually did enjoy the Market St. location downtown SF.
I can just envision Best Buy locally having the iPhone and having their employees talk customers out of buying one for a Blackberry or any device that has some SPIFF on it. In all honesty, it would remind me of my local AT&T corporate store. iPhone, you must be kidding. They all want to sell Blackberries as the only thing worthy of your attention.
I am going to imagine that in some areas that it will be worth it. I just do not see it working in every location.
My 2 tarnished pennies worth and sorry for the rant.