Here are a couple of links to articles and resources that I thing you'll find interesting.
Beyond Blogs - Business Week writers and bloggers Heather Green and Stephen Baker refresh their popular 2005 cover story "Blogs Will Change Your Business" with "Beyond Blogs", a refreshing look at some of the many tools of social computing that are having an impact within the enterprise and among consumers.
Photo Sharing Sites - Looking for photo sharing sites beyond Flickr? Check out this listing and evaluation on Photography Bay of 45 sites.
For those of you with event planning responsibilities, you might find Pictoma worth checking out.