Would you like your screensaver to display the time? Here's a small (472kb) Windows screensaver program to download and install that contains 14 different clock screensavers. Clock Screensaver:

The handwritten one is very cool and the timeline is very slick. Don't be put off by the fact that the site looks a bit dated. The software will run fine on WindowsXP and is spyware, adware etc free.