Hi,
We can imagine to have an application as OpenZim working on PocketBook, to open and read ZIM file format. The ZIM file format, an open, standardized file format to store Wiki content efficiently for offline usage. It will be possible to have all Wikipedia in an SD Card 32 and have the free encyclopedia offline.
Please see French pages
http://framakey.org/Pack/Framakey-Wikipedia
rgds J Rouanet