So finally got a Pre2 on eBay a while ago, and a big thing for me was to see how good of an eBook reader it could be. I started playing around with the HTML versions of eBooks at Project Gutenberg, but the files were a little big. Also, I can't stand their formatting!
So I created a little script that splits the books into chapter files with links at the bottom of each to the next chapter, and added some different formatting. So far, I've got about 30 books reformatted on my web site:
Project Gutenberg: Free eBooks for Smart Phones