Microsoft buys 666,000 IP addresses

RabidMonkey writes: "Microsoft has managed to purchase 666,624 IP addresses from the bankrupt Canadian company Nortel for $7.5 million. This works out to $11.25/ip. An exact list of blocks isn't available yet. There has been a lot of discussion on NANOG about whether this allowed or not, and what the implications to the dwindling IPv4 pool may be. Is this the first of many such moves as IPv4 address space has run out? Will ARIN step in and block the sale/transfer? How long will such measures drag out the eventual necessity of IPv6?"