Getting your personal email on your Windows Mobile can be just as useful as business email. That is of course if your corporate security policy allows it.
For ages now I have had my Gmail account setup as IMAP on my Touch Dual, but I wasn't getting mail. So I gave in and used the Gmail app. Well good news, looks like Gmail and Windows Mobile are now playing nicely together.
To get the settings go here, http://mail.google.com/support/bin/answer.py?answer=78886.