Just released the SharePoint Toggle UI project to Codeplex: http://sptoggleui.codeplex.com/
If you are one of those users who is still getting used to the new SharePoint 2010 user interface, you can now switch between the familiar SharePoint 2007 user interface and the new SharePoint 2010 user interface back and forth!
After installing the SharePoint Toggle UI, you get the option in the Site Actions menu
Click on Toggle Visual Mode to switch to SharePoint 2007 user interface
Notice you still have the SharePoint 2010 out of the box Visual Upgrade options enabled
Click again on Site Actions | Toggle Visual Mode to switch to SharePoint 2010 user interface!