If you must have a quick setup for your Powerbook, one that functions as a workstation with an integrated mousepad, this laptop sleeve from Red Maloo is a nice alternative. The wool felt cover protects your case when it wraps it up, but when unwrapped it turns itself into a nice work station with protective mat, and mousepad. [Coolhunting]
Personally, I prefer the kimono sleeves that those guys are offering. Too bad they’re only available in Japan though.