Most bookstores now sell ePub books, so no "DRM-stripping" is required.
However, I would sound a note of caution. The Asktak device is a Jinke clone, and the ePub support on the other Jinke devices is extremely poor, so there's really no reason to expect anything better from Astak. There are other devices on the market (eg those from Sony and Bookeen) which have much better ePub support, so you should perhaps consider one of those instead of the Astak.
Last edited by HarryT; 08-30-2009 at 04:17 AM.