Rob I totally agree with your assessment on how the government determines GDP and desperately needs revamping. In as much as we would love to believe that the GDP grew at the rate 5.5% in the 4th quarter of 2009, it was due largely to the replacement costs associated with restocking depleted inventories.
Furthermore and more importantly, GDP is a backward looking economic metric, and rather unable to show any true future trend. Economists have determined that this specific number (5.5%) will be an outlier and have no bearing going forward.
But more to your point, it took 100 years to recognize the uselessness of GNP (gross nat'l product) as it never considered international sales among other things. So, sadly it may take some time for the government to acknowledge cost savings associated with the use of Internet as contribution to the GDP.