DC, the more I look the more I think you are correct. It's a full sized SD card slot with a miniSD adaptor in it. COOL!

I've been trying to guess the width of the unit at the botton and the top. I think I like the curved-out area at the top; it could be easy to hold when using FBReader in vertical mode. Also, with the 'stand' wrapped around your hand, this could be a lot easier to hold and use.

I was worried that the weight would go up too much but with a full sized SD card I can retire my mp3 player which gives me three extra ounces anyhow.