Build Your Own Cellular Network
Just about anybody can create an inexpensive cellular base station that routes calls all over the world.
By Erica Naone
The task of running a cellular network has usually been reserved for major carriers. But now an open-source project called OpenBTS is proving that almost anyone can cheaply run a network with parts from a home-supply or auto-supply store. Cell-phone users within such a network can place calls to each other and–if the network is connected to the Internet–to people anywhere in the world.
Good write up on OpenBTS, shame you have to pay for it.