I've been getting really frustrated with Bookshelf's limitations, not the least of which is the fact that if you put your finger down somewhere without holding it long enough it JUMPS to the top or bottom of the paragraph, meaning that if you're trying to scroll down and take your finger off too quickly it jerks you away from whatever you're reading. Also the interface is ugly, the HTML book I'd imported didn't format quite right resulting in the first chunk of it being centered, and did I mention it doesn't read PDFs? This thing cost me $10?
Then along comes Stanza. Stanza has a beautiful interface, a huge library of public domain books easily available, and the book formats it supports? "Stanza contains built-in reading support for Amazon Kindle, Mobipocket, Microsoft LIT, PalmDoc, Microsoft Word, Rich Text Format, HTML, and PDF." [Emphasis mine.] And even better: It's FREE!
The only catch? The program to transfer books from your computer to your device only works with Macintosh. Apparently, they're working on a Windows version (and maybe even a Linux version, which would make me happy to no end). For now, though, I found the works of HP Lovecraft that I was reading on Bookshelf in Stanza's free library, so I'm good for the time being. Once they get the software working on other platforms, this will be the only eBook reader anyone should even consider using on their device.