I was wondering if the mobile UDK uses Scaleform or some other method for doing menus and game UI. I saw mention of something about canvas based ui in the release notes, but could not find any specific docs about it.
Canvas based as in HTML 5? I guess that would solve Apple's reluctancy for the thing starting with an F (don't mention the F word).
UDK mobile doesn't use Scaleform.
There's a lot of documentation about how to make menus an game UI here: http://udn.epicgames.com/Three/MobileInputSystem.html
You should also look at how Epic Citadel does it. Like MobileMenuPause.uc or MobileMenuControls.uc
While playing around with UDK Mobile I just extended/modified those and it worked out nicely.