One of our execs has a Blackberry Pearl and would like to access his email on his Pearl from time to time. Is there anyway he can do this?

He can set up his MobileMe account just like any other account. I get mine that way and it's instantly pushed to my BlackBerry. I even get some two-way reconciliation like read/unread status and deletions.

I 2nd what rambo47 said, in fact my mobile me is my most reliable IMAP account on BIS, it does seem to stay in sync.