Yeah, and one of the neat things about Megareader is that you can hook your Calibre2OPDS catalog (that ties into Calibre, a free e-book management software) to it so you can easily browse your own e-books. Or, at least, that's what I've done. YMMV
As I'm the type who only puts one book at a time on her iPad, Megareader works perfectly for me. It allows me to download my own book right to the reader. Plus, there's the access to a whole bunch of free book sites...
It's my most recent "find" of apps - can't say enough good about it.