Review: Apple iPhone 3GS

I've had the iPhone 3GS for a week now, so I thought I'd share my impressions as someone who upgraded from last year's iPhone 3G. There are dozens of excellent exhaustive reviews out there (see Engadget and Gizmodo's take, as well as that of the New York Times' David Pogue), so I'll just touch on the things that stand out the most for me.

• The "S" stands …