I guess some may have problem in using their BB device, like cannot send/receive emails, cannot check calendar and so on. If you are located in a region somewhere in Europe, France, Middle east…
Dont worry.. Its not your problem. RIM servers are down
Read this – http://www.foxnews.com/scitech/2011/10/10/blackberry-service-crashes-for-millions-worldwide/ . So Administrators.. relax.