You're right. On CDMA it sill prioritize a call and quit other apps. Google's way around this with maps is to cache the maps.
I thought CDMA couldn't handle simultaneous voice and data, similar to EDGE?![]()
All I can tell you is what I saw on the Droid page.
http://phones.verizonwireless.com/motorola/droid/
"Make a call, answer an e-mail, and switch between up to 6 apps simultaneously"
Of course they don't say how it's accomplished, nor do they say the e-mail you're answering is immediately sent.
Still a definite lead in that area though over the iPhone.