Back to Windows NT 4.0 there where a screen saver named "Windows logon". It mimic the usual logon screen (but the dialogue box moved randomly on the screen to avoid some burning process). I think it was also available with Windows 2000.
On Windows 2003 it is not longer available.
Is there a way to:
1. lock a session after a defined timeout
2. have some sort of logon screen displayed as screensaver
3. extra: if it could skip the ctrl+shift+del step, this will be cool (so just to type the password then enter)
As a last resort I could use a screen capture of the logon screen, displayed by a screen saver.