Apologies for length! Writeup with bullets posted on blog. Okay. If you're still here, this describes a little hack I stumbled on using the Amazon wishlist extension (for Chrome, but they have it for other browsers) for saving your to-read list while preserving context.
Honestly, I wish someone would make an iPhone app that would work with the web to do this WITHOUT Amazon, although hey, at least the behemoth can provide this valuable service for nothing, right?