Mini Minty will look like whatever you want it to look like. You make it, you chose the case. The planned basic case would be a altoids mint gum tin, but you can also use it in a Eclipse gum tin if you can make it fit into the small hole, or you can buy a custom made case or what not.
And you can give me the usb drive if you don't know what to do with it.
MiniMinty will use a SD card. Minty uses a CF card. You could try figuring out how to access a usb fat16/32 drive and then mod either the minty or miniminty to use that, but that would require lots of custom code (I think).