I saw a review of the lovely Nokia N9, and I noticed that whenever it is put in sleep mode, it does not shut off the screen entirely - instead, it shows a clock that moves around the screen to prevent burn-in. I rather like this idea, and it apparently draws very little juice from the AMOLED screen (which is what my Captivate has).
I spent some time looking for an Android app that accomplishes something like this, but I didn't find anything like it. If there is such an app, could someone point me towards it? If not, is this even possible?