iPad and Raspberry Pi

If you have seen my blog, you will know I have been interested in using the iPad to handle images while on photo workshops - the main problem was how to save images on a USB pen drive for showing during the workshop, as iPad won't output to USB drive (though possible to do direct output to some kinds of display). But with the Pi it is possible to do this, and the photo shows all that I needed (except for a short ethernet cable, and alternative charger lead for the iPad/iPhone). I'd also ideally want a proper compact case for the Pi. Of course, if you can afford it, an 11 inch MacBook Air of the right spec is probably no bigger, and more versatile, but it is quite expensive and, for a 'proper' computer, quite limited.