This may be a rather niche audience, but it might be of benefit to someone!
I just created this to pass the time while waiting for the release. It’s an applet for the G19 that displays a countdown timer with the days, hours, minutes and seconds until Diablo 3’s release on May 15th.
Enjoy! If you have any feedback leave a comment below.
UPDATE: by popular demand, I have developed a version for the G15 and other monochrome LCD Logitech devices. It’s not as pretty, but it gets the job done, and still shows days/hours/minutes (with a little progress bar indicating seconds).