As hot as E Ink gimzos are right now, many e-book-lovers prefer PDAs and other devices, such as iPhones, that they can use for purposes besides reading. Web browsing, for example.
Over at DearAuthor, Jane concludes a three-part series with a discussion of PDAs and the rest—with mentions of favorites like the Palm TX (photo), the Nokia 770 and the IPAQ 211. Part I was the Intro; part II, an overview of E Ink devices and other devices intended just for e-books.
Detail: E-book apps on the iPhone are rather problematic for the nontechnical right now, because of Apple’s closed approach. But this should change in the near future.
Related: Favorable DA review of Manga: The Complete Guide.