Speaking of new things in iOS 6, Chris Herbert finds a whole bunch of subtle improvements and changes to various apps in iOS6.
One change that I think might confuse folks is in Mail - to be able to mark messages as unread:
If you want to mark a message as unread from Mail while viewing the message, tap the flag icon and select “Mark as Unread”.
and also you can finally insert a photo or video into an email without having to copy/paste from Photos.app:
Mail can now insert photos and videos from within the app. Tap and hold on the message’s body then select ‘Insert Photo or Video’.