Hey Josh, no covers yet. I plan on experimenting with Tyvek booties first, since they are..well..very cheap at a couple bucks a pair. They should be waterproof enough for snow use.
I got the extra 1/2 ounce of down because I simply figured that over-fill will always be better and cheaper than getting a pair that aren't sufficiently warm enough for my personal needs, resulting in me having to sell and re-buy. I have bad circulation in my feet, and my toes get cold easily. I'm glad I got the overfill because when I got the booties, the toe area wasn't that filled. I was able to shift the down from the ankle area back down to the toe area. It's only half an ounce between 2 booties, so each bootie only got .25 ounces more, But just by looking at the photos and comparing with the stock photos on his site, you can tell how much more loft the .25 ounces per bootie results in.
Ah, Mr. Twain indeed! That's my kindle 3 e-reader that you're looking at, but i have no control over what you see. When the kindle goes into sleep mode it randomly generates a picture from an archive of famous writers and images. I don't have any Mark Twain on my reader...maybe it's a ploy to get me to buy some of his books :)