On my iPhone I had a really nice screen protector: Power Support Anti-Glare Film Set for iPhone 3G - Apple Store (U.S.) and am looking for something similar for the Droid.
I don't actually care about screen protection (and have seen the video somebody trying to scratch the droid screen), but this particular protector had one really nice property. It allowed my fingers to glide across the screen easily. When swiping across unadorned droid screen (and iphone screen) with my finger, it will often 'stick' and be difficult to do things like scrolling the screen. With the screen protector, I never had this issue. It also had the nice side effect of resisting fingerprints. The screen protector was also Anti-Glare, wasn't reflective at all, and did slightly distort the view of the screen (which I only noticed when comparing my old phone with the new and am not concerned about).
Is anyone aware of something similar that is available for the Droid?