If your looking for an external tuner or wish to use Media Center on an existing laptop this can be done using the Hauppauge
WinTV PVR2 USB. This requires a system with USB 1.1 or 2.0 ports and drivers from
shspvr. For Media Center USB 2.0 ports are not an absolute requirement as your recordings will fall below the maximum 11Mbps offered by USB 1.1.