Hi Pete,
Thanks for sharing your experience with us.
In addition, you can find more detailed information about the service upgrade in the Office 365 Service Upgrade Center:
Office 365 Service Upgrade Center for Enterprise
http://community.office365.com/en-us/wikis/office_365_service_updates/office-365-service-upgrade-center-for-enterprise.aspx
Office 365 Service Upgrade Center for Small Business
http://community.office365.com/en-us/wikis/office_365_service_updates/office-365-service-upgrade-center-for-small-business.aspx
Regards,
Wilfred Ying