Lenovo's ThinkPads are already all available with 3G support, but the company has just announced a deal with Sprint that will not only add another 3G option, but 4G (as in WiMAX) support as well. That will be available across Lenovo's entire line of ThinkPads and, like other mobile broadband options, will come in the form a SIM card pre-installed in the device. You'll also be able to use Lenovo's Access Connection tool to manage both 3G and 4G connections, which Lenovo claims is the only such tool that can do so.