It is important to have good time keeping on a home network, particularly when receiving Weather Satellite Data. I have made an NTP Server from a Raspberry Pi and a Sure GPS module. I connected TP5 (GPS_Dataout) on the Sure GPS Board to a GPIO port on the Pi, and Gnd to Gnd of course. I used the Python module rpo_gpio_ntp, (link from David Taylor's Site once again) on the Pi running Wheezy Raspian (a form of Debian Linux). All I do is to point the NTP clients at my server, and the computers will all be on the same time.
I now have a very low power device allowing my computers to keep accurate time, without polling the internet all the time. Very effective, and great fun to do.