I had to come home and whip up one of these for myself tonight. I got some double-sided quilted fabric in a wild floral pattern I love. Very Vera Bradley-like. The upside of using pre-quilted fabric is that you get an extra layer of cushioning.
I adjusted the measurements of the pattern according to the size of my Dell Mini. Halfway through I was afraid that my little computer would not fit, but it did--perfectly!