Upgrading to TFS 2010 RTM when TFS is on port 80 with SharePoint

(Note: Please download the latest Installation Guide for Team Foundation and read the Upgrade sections for details on types of upgrades and steps to perform an upgrade to TFS 2010)  Those of you going live on TFS 2010 Beta2 who opted to install TFS on port 80 using the existing SharePoint site will want to take note…