These large companies and organisations aren't going to give up their property they've owned these IPs for years.
Dear Buzz Out Gang and Crew,
All of this talk about the world running out of IPv4 numerical addresses may actually be a hoax. For those that may not want to believe this, take a look at the link below. This link points to the IANA IPv4 top level /8 holders.
http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xml
How To Read Lists:
Each block of /8 Top Class A IPs = 16 Million IPv4 Addresses
Of the Top Level IPv4 Holders:
Department of Defense: 9 blocks of /8, thats 9 x 16 Million IPv4 Addresses.
Apple: 017/8 = 16 Million IPv4 Addresses
MIT: 018/8 = 16 Million IPv4 Addresses
Ford: 019/8 = 16 Million IPv4 Addresses
AT&T: 012/8 & 032/8 = thats 2 x 16 Million IPv4 Addresses
Halliburton: 034/8 = 16 Million IPv4 Addresses
US Postal Service: 056/8 = 16 Million IPv4 Addresses
Level 3: 004/8 & 008/8 = thats 2 x 16 Million IPv4 Addresses
and many many more. You see my point? Why are all of these institutions and corporations sitting on these IP addresses? Does the DOD really need 144,000,000 or 144 Million IP addresses?
Hey people, I think that there maybe some IP squatting going on and it is at the entire worlds expense. I think that the question is at least worth asking these organizations as to why they are sitting on all of these IP addresses.
Later people.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic