[sorbus]

> btw: the kindle, with passive E-ink, has 2 months battery (i.e. over x100 longer)

And my TI-84 has had the same batteries for at least two years (it's getting to the point that I'm starting to wonder when they're going to run out, since I know that it will be the worst possible time). It doesn't matter, it's an irrelevant comparison, unless you're saying that something more similar to the kindle would be better for developing regions where solar power is a major selling point (which is a really good thing to point out - why does a solar powered netbook need a 250GB HDD? Why not a small SSD, if that would save power?).