I know the book has been out for a few months now (release date: June 2012), but I just got around to discovering it. And as I spend quite a bit of time on the road commuting back and forth to work, I usually discover them first in Audio Book form rather than book form, so that's how I found this one.
First, let me start by saying that this book will not appeal to everyone. It is a science fiction novel in the Cyberpunk genre and to really REALLY enjoy it, you should be at least familiar with growing up in the 80's. I, luckily, am a fan of cyberpunk AND grew up all over the 80's so I had a distinct advantage going into this one. That's not to say that someone not from that era won't enjoy Ready Player One, but there are a virtual ton of reference to 80's pop and geek culture strewn throughout the novel that might be lost on those unfamiliar with it.

