Wikipedia
Userplane
Userplane was a white label service that offers both group-chat and one-to-one messenger services, which gives website owners the ability to offer chat between their users in a wall-gardened experience.The user plane provides for the transfer of user application information.
Userplane was founded in 2001 by Mike Jones, Nate Thelen, and Javier Hall, in Santa Monica, California.
Userplane powers chat experiences for many of the top 25 dating sites and language learning sites.
Userplane announced on their blog that they will be shutting down on Aug. 1, 2013.