Ask HN: Any cool accessories or special use cases for iPad Mini?

I live in Brazil and I'm about to get the iPad Mini from a friend who's bringing it down. I've never had an iPod, iPhone, nor iPad so I'm curious to know what kinds of cool things I can do with it or attach to the Mini once I get it. An official Apple store will be opened here in Rio and Amazon is apparently going to open a virtual store (plus warehouse) here, so I'm hoping accessories will become easy to buy.

My first DIY 'accessory', being that I live where I live, will be a book with the pages cut out. No one will want to steal a book. In any regard, what I'll be wanting to do is to use it for work, if possible, but for that I'll need a good keyboard. Can you recommend one? My 2010 MBA's battery has run its course and the computer heats up and gets a bit slow after an hour's use, thus having an iPad+keyboard to work from (mostly just using Google Docs/Drive and Gmail) would be great.

Btw, by 'special use cases', I mean just that (not, for ex., leather cases for the iPad).