We know how you feel. When it comes to broadband Internet connectivity at your properties, ever-changing technology can leave your head spinning, while draining your wallet. First, you had to hard-wire your buildings to keep up in the amenity race. But much of that effort seemed pointless when DSL became available over existing phone lines. Then came wireless and Wi-Fi, so that your laptop-toting tenants demanded "hot spots" in your lobbies and club areas. Now, the tech guy in your office is starting to talk about WiMAX, an emerging wireless broadband technology that promises to pump information faster, and further, than Wi-Fi ever dreamed of. While that sounds great, it probably also makes you wonder if the whole ugly technology upgrade cycle is about to begin again.