Attorney marketing and online social networking

I've been recommending to others (including someone who is running for Family Court judge this year) that it's time for attorneys to start using Facebook and Twitter as part of our professional identities, so I guess it's time to put my identity where my mouth is and start using my Facebook and Twitter accounts accordingly. It's easier with Twitter to separate the personal and the professional because I already have two Twitter accounts, a personal one and a professional one. I only have the one Facebook account, and there's "fun" stuff there, too, not just my professional face. So, I'm thinking about how best to accomplish for myself what I have been recommending to others.