Not sure whether the SDK will be Java-based, but here's some info on the software that runs on the Kindle: <a href="http://arstechnica.com/open-source/news/2007/11/linux-on-amazons-kindle-e-book-reader.ars" rel="nofollow">http://arstechnica.com/open-source/news/2007/11/linux-on-ama...</a>