I went to 21 degrees last night in a HH Exped. I used the SS with some 1/4" Evazote added, and a Western Mountaineering 10 degree bag inside. I kept having to put an arm out of the bag to keep from sweating. Tonight it's supposed to get to 16F. Should be fun.
I'm not surprised, somehow, that I'm not the only nut that saw cold weather coming and immediately ran outside for the hammock. The Exped stays set up in the yard all the time, and I camp in it bunches. Were it not for the wife, I'd probably sleep out there every night. She's the one that bought me the WM bag. She says that now she won't worry when I'm out hiking and a cold and wind advisory happens. Gee, what a sweetie!
The funny thing is that I was coming up to post about last night when I saw this thread and figured that I'd just add to instead of starting a new one. What a trip!
Edit: AT Troll probably thinks that we're funny talking about teens and 20s being a good chance to try out cold-weather gear. It's gonna get to 0F in Freeport, ME tonight with wind chills of -15F. And that's not even a cold Winter's night up there!