I know the Droid font for Android supports Chinese, so you should be able to read the emails at least:
http://www.ascendercorp.com/pr/pr2007_11_12.html
Haven't heard of any multilingual support for the phone in terms of input though, so most likely it will be third party.
There is some work being done on Chinese input by developers:
http://groups.google.com/group/android-developers/browse_thread/thread/957b7b8214769ffb/207085365e5a1eaa
There is an existing Chinese Android Developer Community so they might make one too:
http://www.androidin.com/
Thank you!!
Now I have to read some links