Kersten Hamilton, author of Tyger, Tyger, recently dropped me an email about this new site called NetGalley. Simply put, NetGalley is a place where publishers offer galleys (very similar to ARC's) in an electronic format. This is both cheaper and better for the environment. The website is open to all sorts of reviewers, including bloggers.
The electronic galleys are compatible with the Kindle, Nook, and other ereader devices. I've signed up for it, but have yet to use it as I do not own an ereader at the moment. There are really some wonderful titles available and if you have the chance, you should definitely check it out.
Several upcoming YA books are available for request, including Tyger, Tyger.