Ahh, my hopes were dashed after reading the FAQ-
"I already sync with my company's Exchange server, can I use Nuevasync?
At present unfortunately you can't because the devices are all restricted to a single sync source. It'd be nice if this restriction were removed. If you only use your corporate server for e-mail (and not calendar or contacts or tasks) then you may be able to use IMAP to access it, and still configure Nuevasync as your sync source."
Guess I'll wait for the rumored Gmail Push.