You can get it for $27 on Amazon at the moment (normally $99). <a href="http://www.amazon.com/Pandigital-Handheld-Electronic-Encyclopedia-WikiReader/dp/B0039NLVB2" rel="nofollow">http://www.amazon.com/Pandigital-Handheld-Electronic-Encyclo...</a><p>I'm almost inclined to get one to replace mine, whose screen went permanently dim at some point.<p>The code is open source, so you could theoretically use it with custom content that you adapt to their build formats. They also provide downloads for a bunch of other-language Wikipedias, as well as Wiktionary, Wikitravel, and Project Gutenberg. You can swap out the built-in microSD card (8GB?) for a much larger one and just put everything on it.<p><a href="https://github.com/wikireader/wikireader" rel="nofollow">https://github.com/wikireader/wikireader</a>