http://www.internetnews.com/infra/article.php/3570211
--Steven M. Bellovin, http://www.cs.columbia.edu/~smb
Quote: There is an unreleased report by the Dept. of Commerce
estimating it will take $25-$75 billion to pay for
the transition
$50 billion is a heck of a variance in estimates!
I suppose they could have said that it will cost
$50 billion, give or take $25 billion, and then the
variance wouldn't seem to be so big...
--Michael Dillon
Remember Senator Bentsen: A billion here, a billion there…and soon you’re talking REAL money!
Well, vendors like Juniper were quick to add extra charges for IPv6
to get more out of this budget. 
or better 
Vendors know that .gov HAS to buy the IPv6 license, they have no option
when purchasing anymore (if I understood that correctly).
Best regards,
Daniel