The save functions have been moved from the document folder section to document view.
Open the document, tap the wrench icon, and choose the Share and Print option. You'll find all the familiar options there.
Personally, this is where they should have been to begin with, though it may take getting used to now that I've been doing the other way for so long.
This update also make the iWorks apps universal so they work on iPhones, and added the ability to put your documents in folders. Just tap hold for the wiggle, then drag & drop them on each other to create a new folder, or add to a current one.