BES admins will be happy to hear that BES 5.0 service pack 1 is coming sometime in Nov or Dec according to the latest rumors. We managed to get links to the release notes for the Exchange and Domino releases that you can find below:
From what I have been hearing there have been a few bugs in BES 5.0 that admins are waiting for RIM to iron out and this version should fix many of them. Let us know what you think!