My CR48 fits just fine in a netbook sleeve I found at TJ Maxx. I've had it since late 2010 and had no problems with it being stored there or in my briefcase without a case.. The one I have was 9.99 at TJ MAXX
I'd guess you'd have to re-appropriate other kinds of cases/sleeves for the CR-48, like the others said. Staples has some cheap-ish ones on sale, sometimes even really cheap ones in the clearance section.
I would think that the Samsung Series 5 would fit too...But I don't have mine yet . Once it comes in (thanks Chromebookforum.com) I will post high res compare pics. I have a feeling they will be close to the same size.
What's an Etsy Business? Zora, I doubt I would want anything like that. Now if you could make custom bags with sewing, then it is something I might like. Of course I don't have a CR-48. Still a custom Samsung or Acer Chromebook bag might be cool.
So, if I knitted some CR-48 cozies, do you think that any CR-48 owners would buy them from me? Hehe, lack of cases makes me think. "business opportunity".
That would be pretty neat, although I do wonder how protective a knit cover would be. A friend of mine has a felted cover she made, but she stuck extra layers in it (cardboard?) to make it more sturdy.