You're missing the bigger, and much more legitimate omission: Windows Mobile 7 is running with IE7. Which effectively means these things won't work their way into WinMo for at least a year after the release of IE9.
Since Windows Mobile 7 isn't out yet, I'd like to note that the current version of Windows Mobile's IE is a hybrid of IE6's rendering engine with IE7's JavaScript engine, a Franken-browser no one is ever truly going to support.
