I posted this very question to howardforums, and here's the thread
The answer is that if it's connecting via EVDO, then this is no longer a problem, but over the regular 1X network, it will behave the same way.
Originally Posted by bostonberry
Can a 7130e receive a call while its receiving email (or browsing the web, etc.)?
I have a Treo 600 on Verizon, and calls go straight to voicemail when it's doing a "wireless sync" (which is a lot).