“Whereboutz is a service that allows you to share your location with friends and let them know what you’re up to—it is available as a Facebook application and a free mobile application. (…) Use Whereboutz every day (many times a day!) to tell your Facebook friends where you are and what you’re up to—either from your computer, or from your cell phone. When you post, your friends can find you on a map on Facebook or their cell phone.”
Via GPS World.
It is the same service as plazes.com, isn’t it?