This one looks pretty disruptive. Salesforce is reserving a 5 hour window to upgrade to Winter '08. As always, all i-Dialogue portals will continue running on the previous API version (currently 10.0) until all instances have been upgraded. We will change over to version 11 within 2-3 weeks of Winter '08 release.

Services such as Web-to-Lead and Web-to-Case typically are uneffected by system updates. However, all asynchronous and real-time portal API integration features will not operate during scheduled maintenance.

Please be aware that salesforce.com has scheduled maintenance for your service instance (NA1):

Friday, November 2nd 2007 8:30pm PDT - Saturday, November 3rd 1:30am PDT

During this time, the salesforce.com service will be unavailable. Users attempting to access the service during this time will receive a scheduled maintenance notification page.

The purpose of this maintenance window is to upgrade your service instance (NA1) to the Winter '08 release.

We apologize for any inconvenience and appreciate your patience during this maintenance window. For more information about the great new features available with the Winter '08 release, feel free to log in to the salesforce.com IdeaExchange at http://ideas.salesforce.com and visit the category "Ideas in Winter '08."

-Salesforce.com Support