Alex Salkever has a story at AOL's Daily Finance about China Mobile developing OMS, their own fork of Android.

http://www.dailyfinance.com/2009/11/25/google-hits-a-snag-in-china-as-worlds-largest-carrier-hijacks-a/

He says, "China Mobile is now well on its way to building a code base that is different from the versions of Android being built by Google itself. And more than any other carrier on Earth, China Mobile can cause a code fork problem that could short circuit Android growth in the Middle Kingdom – by far the largest mobile market on Earth."