Martin May of Brightkite writes Smartmobs: Just wanted to give you the heads-up on our location-based social networking service, Brightkite, which we launched into private beta last week.

Brightkite is a location-based social network that enables people to take their online profiles with them into the real-world and make real-world friends. Users can see where their friends are and what they’re up to all while maintaining comprehensive degrees of privacy to non-friends. Depending on a user’s privacy setting they can also be open to meeting others nearby.

You can check it out using this invite link. More info about this new service on the companies weblog.