This is something I never even thought about getting for my Canon S3 IS. My LCD viewfinder tends to get fingerprints on it a lot, but other than wiping it off, I never thought about a protective covering.
I wonder....when the sun is really bright and I have a hard time seeing the LCD viewfinder, I'll just use the regular viewfinder on my camera - the one where you have to put it up to your eye (I'm sure there's a technical term for it). But I know there are some P&S cameras that don't have the regular viewfinder. Would you guys be able to get some type of anti-glare or polarizing stick-on film to help you see the LCD viewfinder better?