Facebook chat was initially confirmed late in March, which was proceeded with a limited roll-out that began in early April for users in San Francisco, Los Angeles, Philadelphia and New York. It seems the testing must have gone over well and that means good news for anyone who was itching to chat and feeling left out. The new chat feature is now available for all active Facebook accounts.
While the ability to chat with other Facebook users is great, it would be nice to see some integration in the future, whether it coming from Facebook building in support for other services or releasing an API that other services can then use to integrate Facebook chat. With such a popular service I am sure the community would be behind it.
Via [Inside Facebook]