After searching for an affordable protective sleeve for my powerbook, I gave up and crocheted this one using Lion Brand Landscapes (very nice to work with, I’d never used it before). I’ll be writing up a pattern once I figure out the changes for the 15″ and 17″ macs. Now that I jumped on the “cozy” bandwagon, I wonder what else I can cover… maybe my bike? 
My Cozy Little Powerbook