Let me clarify...
From a technology standpoint I agree they are very cool and it's nice to finally get a viable form of electronic ink that doesn't cause eye strain. From a consumer standpoint I'm not interested in the slightest. I have always found electronic documents less usable than hard copies--especially if it's a document I'm likely to reference a lot. I think the non-textual cues (smudges, a slightly torn page, knowing where I am in the book simply by holding it, etc) from the book help me organize all the information and provide shortcuts for my brain when I'm rereading it. Electronic documents remove those cues.
More than that, I wouldn't buy a microwave that only cooks Kraft foods. I'm not inclined to buy ebooks that require a $200+ electronic device in order to use. (I don't buy online music that I can't burn to cd either.)
Cat, do you use it primarily for leisure reading or work-related documents?