The Citizen Media Law Project is an online project run by the Berkman Center for Internet & Society and funded by the John S. and James L. Knight Foundation.
The project features a database of cases related to social media. In addition the list of resources on their legal guide is helpful to anyone searching for information related to the law and the Internet.
The project has a list of lawsuits involving blogs. This is a great resource and will be helpful for my list of attorneys who have argued cases involving social media.