Yea, we have seen the light! The fast and light, that is, and woe unto those who travel with too much crap on their back, for they shall wail and gnash their nasty teeth and beat their sunken chests. Go forth and get a bivy, we say.
The Marmot Alpinist bivy is about as minimalist as possible. Constructed from Marmot's 40D Nylon Membrain waterproof breathable fabric, and with fully taped seams, the Alpinist weighs in at less than a pound. It rolls up the size of a quart bottle, although it will also flatten in your pack so it can be crammed in anywhere. Feature-wise it has a three-way zipper and... well, that's all. It's big at 36"x86" so you won't have any problem stuffing a sleeping pad inside; that will also keep it from rolling too much so you can find the zipper easily. This is definitely not for the claustrophobic, however.
The 3-way zipper allows for one or two openings, starting above your pointy little head and going down the left side far enough to get in or out with just a little wrangling. There's a good storm flap that with a little forethought allows for multiple venting configurations. Probably not a good idea to zip it all the way up, although we didn't test it that way. Again, the key word is minimalist: there is no mesh and no pole. It would be nice to see a little of each, but then that would add to the weight. The Alpinist is a tough little sucker too, with a slightly heavier fabric on the bottom to resist wear and tear. For ski touring, big walls and just-in-case use the Alpinist will score big with those who follow the gospel of St. Fastenlite. And in perfect GearFlogger orange, no less.