"Ditto on iKlear every couple of days, best cleaner I've ever used for my iPad and iMac screens. Found it at the Apple store."
Couldn't agree more...I'm hooked on iKlear. We use it for our glasses, my gun scopes, video and camera lenses...it's spendy, but incredible. I love the extra stash you get with purchase too. The wipes, micro fibre towels, et al. Big Fan of iKlear for all of my electronics and optics.
BTW, we have two iPads. my wife's, and mine. Our 5 year old son is also a fan, so maybe another in the future. My wife could care less about the fingerprints, me...anal as hell. I wipe mine down every day. Hers, once a week when I pick it up

I agree with other's sentiments...many, many more iPads in our futures...use 'em, and don't worry about fingerprints, peanut butter stains, or the like...they're meant to be used, not babied! Now, if I can just get over my OCD and "Anality" of keeping this SOB clean!!!
