My primary question - will the Nexus S support 3G functionality on AT&T

It would be excellent if this phone worked on AT&T's 3G network. But for the time being, it appears as if it won't.

Some other things that don't seem to be on the list of features:
a.) MicroSD card expansion.
b.) Front facing camera
in reference to: Android 2.3 - Google Mobile Help (view on Google Sidewiki)