In July 2010 at an Outdoor Show in Germany, Exped (http://www.exped.com/) revealed a sleeping pad which would easily compete with the famed NeoAir. Personally, I wasn't a big fan of the NeoAir for many reasons, but it does have a following. More correctly, people either love it or hate it and one could probably read between the lines a bit when it was announced that Thermarest was redesigning the NeoAir for the coming future.
The Exped SynMat 7 UL in an insulated sleeping mat which weighs just 16.57 ounces (470 grams) for a rectangular 72.04"x 19.68" (183x50cm) and an intriguing R-value of 3.5. Insulation is synthetic which is laminated to the top and bottom of the inner walls. This makes it significantly warmer than the NeoAir which is claimed to retain an R-value of 2.5 for nearly the same size and weight of 14 ounces.
Like the NeoAir, the Exped SynMat 7 UL packs down to the size of a half-liter water bottle and comes with a unique "flat-valve" system which enables the inflation and deflation valves to be separated and thereby is claimed to be easier to operate.
If you aren't a fan of lighter and cheaper (but more bulky) closed cell foam pads, and the NeoAir isn't in your gear closest for one reason or another, the Swiss Exped SynMat 7 UL might just be an answer for you...when they are put on the market. So when it that? Well, in north America it won't be until March. At that time, two sizes will be available (Small 64"x21" and Medium 72"x21"). There is discussion on a larger size which is believed to be 78"x20".