Way to remove or minimize iPad/iPhone 4 glass scratches?
You might check out the resurfacing compounds from TDI Smart Technologies.  They seem to have come up with their own compound formula for removing scratches from Glass, Acrylic and even Gorilla Glass touch screen panels.  Here's their link...

TDI Smart Technologies - Glass, Acrylic, and Gorilla Glass Compounds

As far as a screen protector, I have always loved the screen protectors from Screenguardz.  Compared to the ones at Best Buy (forget which brand but they are stickier feeling), they are extremely smooth and the anti-glare is great in sunlight or other bright environments.  Here's their link...

ScreenGuardz

A little late here but I hope this helps someone that comes across this in the future.