Hey, gang- thanks for the interest and feedback!
Thomas mentioned that his Hennessy couldn't compete w/his Contrail... that's the great thing about THIS Hennessy... it's only, by claimed specs, a half-ounce heavier than even the Contrail! (Although my measurements indicated about 3 more ounces on the Hyperlite.)
Several people mentioned insulation. Yup, it's important. (It's important when you're sleeping on the ground, too!) The Exped Downmat visible in several photos is a Downmat 9 LW, the 25 x 77 model with R-8... 3.5 inches of down insulation under me. Love it! And while exploring the realm of hammocking, I decided to just use equipment I have on hand before investing in (or more likely making) an underquilt. I've been thinking about trying an Exped Multimat in the hammock this summer, the price sure is right, & I like the width.
The Grand Trunk Nano 7 is the other hammock I mentioned. I love the hammock, and I (GASP!!!) even take it with me on some backpacking trips when I'm already carrying a tent. I think mine weighs 6.7 ounces, IIRC. But I HATED sleeping in it. Small, compressed too much on the sides, far less stable feeling than the Hennessy. I guess I'm just not man enough to spend my nights in the Nano. BUT... that said, even with a custom cuben fly and bugnet, the setup Kevin described is only 2 or 3 ounces lighter than the Hyperlite. That's impressive specs for something "off the shelf!"