How are you using your Facebook and Twitter Lists?

I had an interesting conversation with my boss the other day. For those who don’t know, my boss and company I work for have been adamently against the use of social networking for business from day one. Well, now that they know that I have been using Twitter for us and gained about 100 strong leads (which are about to close for orders totally over $500K) they are very interested in what I’ve been up to. He wanted to know how we could leverage Twitter for an upcoming trade show. His concern was how we could target certain states. Lucky for him, I had already