gdShutdown2 is floating half transparent on the desktop next to Google Desktop Sidebar.

Features at a glance:

• shutdown, standby, logoff, restart, hibernate and lock your PC
• scheduled sign-off through Google Calendar from everywhere at any time.
• date & day of week is shown with a shortcut to Google Calendar
• fast install and easy to use
• button position, date and confirmation question customizable
• Google Desktop 4 required and Firefox with Google ToolbarFirefox with Google Toolbar is highly recommended for best Calendar experience