Kindle's Mobi format should work without a problem but if its DRM-ed AZW, then it probably would need stripping and then converting >_> There are some ebook stores (fictionwise and smashwords) that most people seem to default to if they're not using the Kindle

I got mine off of Newegg Canada but Buy.com and Amazon.com are cheaper usually if you can get it from USA - the JBL goes for $99 while the Jetbook is about $135 I think.