IPv4 Black Market
Market price for a public IPv4 addr now at $11.25.
Sent to me by way of a LinkedIn conversation ...
"Nortel, in bankruptcy, sells IPv4 address block for $7.5 million" http://blog.internetgovernance.org/blog/_archives/2011/3/23/4778509.html
(One of several places where the story is breaking.) Obviously Microsoft is betting that price will climb.
Divide $11.25 by 4 billion. Divide that result by 4 billion. Then one more time. The price of an IPv6 addr is really really low today.