This from BlackBerry-maker Research In Motion:
BlackBerry subscribers may be unable to send or receive messages. Subscribers may also be unable to register their device, roam in another location, or use other services such as Internet browsing.
BlackBerry Internet Service subscribers may be unable to use the BlackBerry Internet Service web site or perform activities such as creating new accounts, accessing their Internet mailbox, integrating third-party email accounts, or viewing email attachments.
Devices may not receive new service books. BlackBerry Connect and BlackBerry-enabled devices that require a new PIN may be unable to receive the PIN.
BlackBerry Enterprise Servers may be unable to connect to the BlackBerry Infrastructure.
Wireless service providers and device resellers may be unable to use BlackBerry administration web sites or perform activities such as creating subscriber accounts or provisioning services for subscribers.
You know, starting to think this stuff is happening a bit too often.