You can read this article on Lawsuit filed in Chicago over iPhone battery. I personally think this is crazy. There's information all over the place regarding the battery life. Initially Apple gave wrong information (smaller numbers). Nobody's gonna sue Apple for the battery lasting too long! If you look at Robert Scoble's comparison of his son's iPhone battery life to his own Nokia N95, the iPhone beat the Nokia hand's down.
Apple requires an iPhone user to pay $79 plus shipping to send the phone to it for battery replacement and $29 more if the user wants the company to provide a temporary phone during the three days needed for the procedure. This is a bummer but most people have moved on to a new cell phone before they've recharged their phone so many times that the battery needs replacing.
Also noted, the rapper Eminem is suing Apple for selling downloads of his songs without permission. We'll keep an eye on this one.