I have no idea how I came across it, but I found The Law Portal-Law Primers for the Arts today. As the name implies, the site has links to other sources of information on various laws that apply to the arts. There is also a link to information about how to conduct legal research online.
Some of the topics covered you might expect-free speech, cyberspace law, non-profit law, copyright/fair use, setting up a business, contracts, taxes, visas, etc.
There are some issues covered with which I hadn’t anticipated when I visited the site like those surrounding the use of various materials in the creation of art. The site not only links to articles and laws dealing with this subject but a place to find the Material Safety Data Sheets and OSHA regulations surrounding their use.
Something else I hadn’t expected was an article on what to do if an artist starts performing in your gallery without permission.
The site is a good resource not only for law regarding many of these issues, but also policy discussions on the topics I have mentioned as well as things like network neutrality, privacy and media consolidation.