I knew of lawyer and entrepreneur Mike Curreri from his having founded TrialNet in the mid-1990s. In fact, I wrote about him as an “Internet innovator” for Law Office Computing several years ago. So I was intrigued when I read this article in the Boston Globe about how Mike used LinkinIn.com to look for new professional opportunities — sufficiently intrigued that I signed up myself. LinkedIn.com is a business networking service that operates along the “six degrees of separation” principle — I know these people, who know these people, who know these people. You upload your contacts and LinkedIn tells you who among them are already members. You then invite other members to link to you, expanding your circles of potential contacts and theirs. You can also invite non-members to join. There is no fee for any of this, and I was pleasantly surprised to find quite a few people I knew were already members. I’m not sure where this will lead, but it is fun to play with.