What Should I Read Next (http://whatshouldireadnext.com/) is as straight-forward as it comes. Simply type in the name or author of a book you like and suggestions of your next read pop right up. A quick click and you are on the Amazon website should you choose to order it on the spot.
WhichBook (http://www.openingthebook.com/whichbook/) asks for a few more moments of your time. Whittle down choices by first selecting from a few choices, like whether you want something funny or serious, or prefer a short read to a long one. Again, suggestions pop up for your consideration. You can click through to Amazon again or go through their "borrow" tab, which may or may not link to your local library.
Finally, another blog reader suggested Oh So Many Books on Tumblr (http://ohsomanybooks.tumblr.com/). Great photos and comments/notes about the books will suck you right in. Love the enthusiasm of a stack of books on a night stand!
As for me, I am just finishing "The Night Circus" by Erin Morgenstern. Very different. I'll let you know what I think once I finish.