Lawyers and law firms that recognize the value of sites like Facebook, LinkedIn and MySpace in building their businesses are at the forefront of a new networking movement. At the same time, these pioneers are blazing ethics trails into previously uncharted territory. As with any attorney venture, the use of social networking sites can be subject to state ethics rules and regulations. Just because the interaction is in cyberspace, rather than a conference room, doesn't mean it's immune to regulation.