As long as the reliability and security of IPv6 is in question there will be demand for IPv4 space.

In addition, for many organizations this represents a significant capital outlay in changing out all of thier infrastructure.

Many organizations in the U.S. have eliminated or outsourced the expert staff who would have done this three to five years ago and are looking at a Y2K-like consulting fee scenario to get from here to there.

It is one thing to make such a change to a better solution, it is quite another to make such a change in a market where the dominant player has yet again missed the mark on security and compliance with standards.

Until Microsoft gets their act together we're going to see a market for IPv4 address space.

Given what we are seeing in the way of security issues on Vista I think it will be a while before anyone wants to trust their enterprise to IPv6.

Nobody wants to be the first casualty, and who can blame them.

As long as the cost of obtaining IPv4 address space is less than perceived risk or the hardware replacement costs for functioning IPv4 infrastructure you are going to see demand for this address space.