On Wednesday San Mateo, Calif.-based startup ShareGrove announced on its web site that it had been acquired by Facebook.

ShareGrove also noted that staff would be joining Facebook’s engineering team — this looks like a talent acquisition. ShareGrove offered a variety of social network, allowing people to gather online and engage in private conversations using email, a Facebook-like Wall and chat, as illustrated in this company video.

VentureBeat reported that only one of ShareGrove’s founders, Adam Wolff, would join Facebook, although it was unclear which product team.

ShareGrove used Facebook Connect to build its conversation space and debuted last fall at the DEMO conference. On its web site ShareGrove says company operations are “winding down” as of today and the service will be completely disabled by June 1, whereupon user data will be deleted unless otherwise requested. New user registration is also disabled.