Here is a bullet list of things I noticed after a couple days playing with my iPhone 3GS (all this has originally been posted to our Twitter feed, which you can follow @hardmac_dot_com).
Notes that you type on the iPhone or in Mail>Notes>On my Mac get synced OTA via MobileMe.
In Mail's Notes you can change the font. When you sync the note back to iPhone, the font carries alongDIE Market Felt DIE
The screen's oleophobic coating really makes it easier to clean the smudges and feels velvety.
On iPhone 3GS youn can display battery charge as %: go to Settings>General>Usage>Battery level.
the 3GS's camera is great: tapping to focus/adjust light is amazing wish they'd bring that to compact digital cameras.
The iPhone3GS camera is way better at shooting in low light conditions.
Voice Control makes me feel like Captain Kirk. Wish they had the "beam me up Scot
