And this is what Jeff says about these cases:
EO SLIP CASE :
It is big enough to fit the eo with the Extended Battery. The only and biggest problem with this case is that it does not bring any protection to eo's screen. It has the the EO logo and it's made from grey color fabric and it looks elegant.
EO PORTFOLIO CASE :
The portfolio is more rigid but there I also feel that the screen is not enough protected. They should have inserted metal or hard plastic plate in the side toward the screen to protect it. The eo with Extended Battery does not fit to well in this case . The EO portfolio is elegant and it's black with a embroidered TabletKiosk logo in green.
I am overall satisfied but it's a shame that the screen is not protected enough in both cases. But something is better than nothing. I feel that a thin metal or plastic plate inserted between the layers of fabric in the case would have done a very good job protecting the screen.