Low Power Data Display Idea Needed

I have some weather data that I'd like to display on the wall of my kitchen. Ideally, I'd like to have a small LCD-type display that could display a web page, but I would prefer not to have to plug something into the wall. I can probably wire up a solar panel outside and a battery to power it, but this necessitates a very low power display. I've tried a cholesteric (e-ink) Kent display in the past, but they do not offer very good graphics capabilities. Something like an iPad would be perfect, it it was lower in power. Is there anything else someone could recommend?

Edit: I just realized a small Android tablet (7" or so) would be ideal. Can anyone recommend one?

I would prefer not to have to plug something into the wall

You still need to plug in the Android tablet. A similar device (WiFi, touch screen etc etc) is chumby (or the compatible Sony Dash).