I have played around with the "gold master" on the simulator, it is by far much better then 2.2.1. New features:
-Copy and paste (finally! and it's very quick and easy, much better then clippy for jailbroken devices)
-In app purchase (imagine buying new levels for games from within the game itself, and FREE APPS WILL ALWAYS BE FREE)
-Accessories, apple demoed a guitar amp. for it, it looks kinda cool
-Spotlight, allows you to search for your apps quickly and easily
-A crap ton of new developer API's (yay for me!)
NEW FEATURE I'VE DECIDED TO TALK ABOUT:
YOU CAN NOW PURCHASE MOVIES AND TV SHOWS FROM THE ITUNES APP, I forgot if this was in 2.2.1, mainly since I had 2.2
- A couple more features that I can't talk about because they are covered in an NDA, so I can't talk about them
It's free for the iPhone but $9.99 for the iTouch, however since I'm nice WHEN IT COMES OUT THE 16TH I WILL BE POSTING A LINK TO DOWNLOAD IT ON ISODICUSSIONS
I am also looking for new app ideas, so PM me if you have a cool idea for an iPhone/iTouch app, NO GAMES I DO NOT HAVE THE SOFTWARE TO MAKE THEM. You will receive mention in the app if I use your idea via an easter egg of sorts.
And I am working on a way to get SSH on an unjailbroken device, however I will never release it to the public since I don't want apple to be pissed off at me
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