Please check out the Ben Nanonote -- this is just the sort of thing that it might be good for. I know that some kind of inform interpreter has been ported for it, but a nice little adventure client could be very spiffy!

Project page: http://en.qi-hardware.com/wiki/Ben_NanoNote

Sales site: http://sharism.cc/ (You can also use ThinkGeek, I believe.)

I have one of these things with the latest firmware (OpenWRT linux with some modifications). It is an incredibly cool device. You actually have a keyboard that has all the stuff you need for programming (or general unixy/emaily things), a pretty nice colour display and a reasonable amount of horsepower. I like to think of it as an SGI Indy that I can put in a pocket...