I've been slowly replacing pbook classics on my shelves with ebook versions. I've posted the files that I put together here:
http://www.bullandcross.com
They're totally free for download, and in the Public Domain in the US. I've designed covers for each of these, added navigation markers (chapters, table of contents, 5-way to navigate) and posted them in both Mobi & ePub versions.
Enjoy!