http://itunes.apple.com/us/app/vbookz/id366703930?mt=8
Don't know how we missed discussing this one today. A $5 app for the iPad which will download and read
public domain books to you. No worries about copyright issues.
It's available now. I might pick it up, will post a review if I do (and someone else doesn't beat me to it).
Before you ask, does not say it supports side-loading, only that it can download books from Project Gutenberg.
There's also a
review on Gizmodo.