Experimenting with one-button interfaces...

Tried adapting a Sansa Clip mp3 player to a one-button interface.
On one hand, it worked. Yay.  On the other hand, it also sucked.

All the menus loop when scrolling - which is great, if it's easy for you to twiddle all the buttons. However, it's *really* tedious to use up/down/left/right via a switch scanning type interface.  So, I'd go with macros, except that due to the looping menus I've yet to find a good way to get to a known "home" position from an arbitrary location within the device's UI.  This has got to suck for blind people as well.

Anyway, some pics.  Overall, I'd call the adaptation a failure. But learned a bunch. Maybe I'll make a one button mp3 player from this kit sometime.