Google Sidewiki is a browser sidebar that lets anyone contribute and read information alongside any web page. Now the issue for pharma is that anyone can post information on a pharma website. That information may be good, bad, accurate, inaccurate, on-label, off-label, etc. So you get the picture. No one can effectively control and monitor this type of user-generated content. You can try to block Sidewiki, but consider that a temporary measure since developers will continue to find ways to get Sidewiki to show up on your website. Here's a little video that further explains Sidewiki.