Very happy to read this.
Will be upgrading later this evening.
Is iMessage available for 3GS? And what about the Photo editing thing?
I upgraded yesterday and although it took a very long time and I've had some strange things pop-up with the MobileMe to iCloud migration, everything seems to be working fine. Overall speed is good, sometimes typing seems faster as there is little lag.
I'm surprised about the photo editing! I was about to say "no, there isn't" but i've discovered it at last! nice surprise! However, I tried applying auto-enhance and then saving and the photos app crashed a couple of times.. Anyone else experience this?
My favorite feature so far: notification center for sure! however, I don't have the reflex of swiping down from menu bar quite yet! Or when unlocking, my finger goes towards "slide to unlock" instead of selecting the app notification icon. With time habits will change!
Reminders is elegant but disappointing. I know that the 3GS does not get the geolocation reminder features, but it is disappointing all the same. It feels much less as a "must have" and other reminder apps out there have similar features. It doesn't change to landscape view, strangely...
Other notable improvements:
Safari does seem faster, and the reader function is nice.
Calendar week view when turning into landscape view is a nice touch.
I hope to find a few more surprises soon, but overall a good update, giving me new pleasure in using my "old" 3GS