The funny thing about game-changing technologies is how long they can take to change the game. I first wrote about WiMAX (aka IEEE 802.16) more than three years ago, when specifications were just being finalized.
Today is the day IPv6 finally goes live. For as long as there has been an Internet IPv4 has been synonymous with IP and nobody really stopped to think about which version of the protocol it was. But IPv4 has outlived its usefulness.