There are no bindings for various UIAccessibility* items. Nic Wise created a ticket some time ago regarding this: https://bugzilla.xamarin.com/show_bug.cgi?id=2360.
You can use UIResponder.SetValueForKey() to set some accessibility items programatically, but I also need UIAccessibilityPostNotification().
Has anyone created a binding for UIAccessibilityPostNotification or can someone from Xamarin help me create one?
I'm really surprised there is not more support for voice-over accessibility in MonoTouch. IMHO it is very important to support this in our apps. Nic created a great seminar on accessibility for MonoTouch and Android. His extension methods are here.
I've created some extension methods to set accessibility traits which are used to indicate things like a control is a button, link, selected, etc. I posted them to a StackOverflow question.