Two different applications have taken Wikipedia and compressed it into smartphone-digestible form. Both sell the resulting database for $10. WikiPock takes up about 4GB of storage, and is currently available for Windows Mobile and Blackberry devices. It’s $9.99 for the basic version, but you can opt for a version that includes updates for $14.99. You can also get a pre-loaded 8 GB microSD card if you’d prefer for $15 extra (4GB microSD for $10 extra). An iPhone version is in the works, but at 4GB of required