Konkreet Labs' Gwydion ap Dafydd hacked and hollowed out an old book, all with the purpose of giving his petite size MeeBlip, a hackable, affordable digital synthesizer, a new home. He even lined up the power light with the swine illustration within the German cookbook, Praktisches Kochbuch.
Want to make your own? You can order a MeeBlip for $139, and you'll get the open source assembled board, exterior case, and 9V power/wall adapter power supply.
If this project is a little too geek-technical, how about reusing some old books to get your tech organized and ready for on-the-go use?