Northbridge is a project that I have been working on for quite some time. Originally, it was intended primarily for use on the BlueCircuit Server, and was going to be run entirely in game. Though, as the project evolved, I discovered how much easier it was to develop with a PHP webserver than using ComputerCraft's modems to relay messages to an in game ComputerCraft server to hold and send data.
Now, lucky for all of you, it is open for public use now! At some point there should hopefully be a client for ComputerCraft and possibly OpenComputers to use in game.
If you want to assist the team in this project, e-mail me at firstname.lastname@example.org