Looks like RIM is holding another planned service outage, this time for "system upgrades". If you're located in "The Americas", your BlackBerry service could be affected. The upgrade is planned during the "regular maintenance window" of 2am - 6am EST for this Saturday morning, May 3rd. Unless you're pulling an all-nighter, you should be ok on this one.
Don't believe me? Call RIM's Customer Support line at 1-877-255-2377 and you can hear a lovely pre-recorded message saying the same thing! :-)
While we're on the subject of phone numbers, if you have any questions for this week's CrackBerry.com Podcast be sure to call them into our hotline at 1-866-904-5772 ext.222