Microsoft executive Bob Muglia said he was meeting with a chief information officer last year when the man grabbed him and said, "You don't get it. We never want another update from Microsoft again." The man was frustrated by the software updates a corporate customer has to install if it uses Microsoft software — security patches, service packs, other bug fixes. Instead of having to install alerts and patches every month, corporate customers won't have to worry because Microsoft will do it for them. 

http://seattletimes.nwsource.com/html/microsoftpri0/2012344672_howthemicrosoftazureappliancechangesthecloudcomputingskyscape.html

More information on Azure: http://www.microsoft.com/windowsazure/

Urs