On Sun, 16 Aug 2009 22:12:44 -0700, isw wrote:

Functionally impossible. By adding money, you can reduce the drift rate
but you can't make it zero. Period. Just use NTP. And *stay away* from
the stratum one servers like NIST; they have better things to do than
keep your computer's clock on time.

Why bother with an internet solution? It won't work for laptops,
PDA's, stand alone PC devices, and such. A WWVB receiver is cheap
enough that it's included inside weather stations, alarm clocks, wrist
watches, and yes.... computahs:
http://www.meinberg-usa.com/usb-radio-clocks/23-40/wwvb51usb---wwvb-radio-clock-for-the-universal-serial-bus--usb-.htm
http://www.atomictimeclock.com/radsynhome.htm
http://www.beaglesoft.com/radsynhome.htm
http://www.timetools.co.uk/products/mps-time-server.htm
etc...
The only problem I can see with building one into a PC is the RF noise
generated by the PC will probably trash the receiver. That's what
long extension cords and external antennas are good for.

You can also sync to the local CDMA cellular provider, although the
prices are close to astronomical:
http://www.beaglesoft.com/celsynhome.htm

Got $10.70? Build your own:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=561-1014-ND