This is SO ridiculous. Most people here probably spend HOURS and HOURS every single day staring at LCD screens, either at work or at home. I know I'm one of them. Blogs and online news sources are hugely popular and many/most of those articles are several paragraphs long or longer. And still, I don't think I've heard a single report of someone's eyes burning out of their sockets because of how long they've been reading things on LCD screens. If you are seriously getting headaches from reading news articles on your computer, which millions of people do every day, I think there's something wrong with you. I really think all the "e-ink is the only way to read on a screen" stuff is so much marketing BS.
People read that way because they don't have much choice other than printing it all out, which really only makes sense for something you're going to spend quite a bit of time reading.
Nonetheless, many people find reading on paper far nicer than reading on a bright backlit LCD, and find the latter to be pretty annoying for any kind of lengthy reading (as opposed to frothy/short reading like blogs, forums, etc, where the dynamic nature of a computer display more than makes up for the display quality).
That isn't to say that e-ink is as good as paper -- it isn't -- just that conventional backlit LCDs like the ipad uses really aren't the best for the sort of reading that other ebooks are aimed at, and e-ink is arguably a bit better.
[I also spend my whole day staring at an LCD display, and far prefer reading a paper book if I've got one handy. I'm a bit meh about current ebooks -- e-ink is a nice idea, but the hype rather exceeds the reality -- but the ipad is a step backward for that usage as far as I can tell, and even
more hypetastic than e-ink...]