I picked this neoprene sleeve up on eBay to tide me over while I decide what I want to do:
http://cgi.ebay.com/ws/eBayISAPI.dll...=STRK:MEWNX:IT
Actually, I like that design of sleeve, easy in, easy out, protects it nicely, no zippers (I have this fear that in inserting and removing the kindle from a zipper case, there would be at least one point during my life of ownership where I drag the screen across the zipper and scratch it by accident) and best of all, cheap. I used a nearly identical one on my k2i before I sold it.
I do like the look of the amazon kindle case (non-lighted) but I really like doing one-handed nekkid reading, keeping the device light and easy to maneuver.