Audio Footnote lets you record notes while reading an e-book
After reading Joe Wikert’s review, I decided to buy this app. I’ve been listening to the audiobook version of Stein On Writing during some of my walks, and there have been times I would have loved to be able to jot down a note without leaving the e-book. It sounds as if this might help. I’ll post a follow-up when I’ve had a chance to use it for a while.