Well, I got my Droid-X. Imagine my surprise when my $550 phone failed to properly communicate with my employer's Exchange server. Turns out the Droid-X has some software glitches relating to Exchange. Push e-mail will not work at all with Exchange 2003 and only works intermittently with 2007 and 2010. Polling e-mail may work but there are also issues with the notification system. Your phone might download messages off Exchange but fail to notify you about them until some time has passed.
Motorola is providing a free license for a third party app called TouchDown to anyone who writes in and complains about this issue. This app normally goes for $20. It is without a doubt the best mobile Exchange client that I've ever seen. It offers features above and beyond the stock Motorola application. I would encourage anybody who needs to use Exchange to get this application -- even if you aren't dealing with the push e-mail/notification bugs. It would be worth paying for, IMHO. Getting it for free because Motorola couldn't run their Exchange application past QA before launching the Droid-X is an added bonus.