I'm on Cingular, and my phone rings when I get a call in the middle of drafting an email. I answer the call by pushing the track wheel, and the unit immediatly returns me to my email message. I can even continue typing my message while I'm on the call on my earpiece. I've never tried sending the email while I'm on the call though. But I also get calls through when I'm surfing the web, though.
Hey Dawg -- how ya doing?