Finished up a very simple winter hat on the trip (I figured a hat would be a good excuse to get to knit with circular needles on the plane). Its Patons Canadiana Worsted Weight Stonewash on 16" US #8 circulars. Emy pointed out that ribbed knitting doesn't roll, but I finally figured out that you're supposed to do a double roll to make the brim.
Now I get to start the cool new any-guage hat pattern that Emy gave me for my birthday!