I may well be late to the party blogging about this upcoming new toy, but it is one that I'm excited about checking out when it ships in Spring. 

Can a 9 oz air mattress offering 2.5  of thick padding really exist?

Thermarest believes it can.

Will it be enough to lure me away from my current 4.7 oz solution and actually inspire me to take MORE weight? We shall see

For more details, Gear Junkie has a great write up here.