OutdoorJunkie: yep, have used a pad a couple times so far. Ironically, the pad worked great during a week of summer Scout camp. Temps were moderate and the humidity at night was low (quite remarkable for central PA at the end of July!).
Used the pad during an outing near Harper's Ferry two weeks ago and ended up in a pool of sweat. Temps were similarly warm, however, the humidity was near 100%. Not only did I not sleep well (which is one of the main reasons I now am focused on learning more about hammock camping), but I needed to wash the hammock when we got home. Ick!
I didn't need much convincing after that experience to get a UQ... was just a matter of which one.
BTW: Just got word from AHE that they've received my order (New River) and it should ship by the end of the week. Oh boy, oh boy, oh boy!!!
Next challenge: making a portable hammock stand. Unfortunately, the next outing on the Scout schedule doesn't have decent hanging options near the camp site. Need to get to Home Depot this weekend!