I was browsing around and I found that you can get small e-ink displays for very reasonable prices:
They have very low power consumption, especially standby power (they essentially only draw current when changing the display), and are easily readable in direct sunlight, so may make a good option for a display for an outdoor radio.
The disadvantage is that they have a pretty slow refresh time and don't handle moving images well, so fast tuning or an s-meter may not work well.
Thoughts?
