I recently got a Kindle. For my purposes, the best feature of it is that one can download many of the classics that Liberty Fund makes available as an e-book PDF, and convert them to the Kindle. I now have The Federalist on mine. Now if I can just figure out the clipboard feature, I can do real work on it.
P.S. Unfortunately, Kindle can’t seem to convert PDFs downloaded from JSTOR. They are still working with the different PDF formats, apparently.