I can't quite determine if this "Bright Blind" by designer "Mongoose" is in production yet—that it's on GNR8 strongly suggests that it is not—but it's got success written all over it. The artificially backlit blind works as both an amusing cubicle or windowless office accessory and as a legitimate attempt at fooling yourself into believing you are outside. I'm sure if someone started selling these they'd sell a ton.
Of course, this should be super easy to do yourself. The concept uses a flat sheet of EL light, but you could probably figure out a way to diffuse some soft fluorescents through some plastic or something.
Bright Blind [Pipeline.GNR8.biz]