Just wait until "ipv6 conversion specialists" are charging you $450 an hour to make sure your business is not floundering because you ignored the problem until it was an emergency.
Would you mind describing such an "emergency" situation, in detail? The only "emergency" scenario I can think of here is if your ISP/upstream dictated that within, say 90 days, they would no longer route your IPv4 traffic. The flaw in assuming such a scenario is that no ISP/upstream has a positive financial stake in doing this. They gain nothing by taking away your IPv4 abilities. In addition, if said ISP/upstream really was determined to do this, they'd simply send out an engy to install a v6/v4 gateway router. Problem solved, no material change for the customer. Note this last point carefully, because this is what the US "IPv6 conversion" will look like at almost all organizations, and most orgs worldwide with a substantial v4 installed base.
Note the U.S. government for example, and it's millions of v4 devices. If they started a wholesale conversion to v6 tomorrow, how many years, and how many 10s of billions of dollars would be consumed before the project is completed?
The people screaming like Henny Penny have no clue what kind of costs are involved in such a conversion to v6. And apparently they don't realize that most organizations that actually need large blocks of public addresses already have more than they need. Look at all the /8s assigned to US government agencies, US corporations, US carriers, the UK government, etc. If one isn't in any danger of ever exhausting one's supply of v4 addresses, what financial motivation is there to change to v6? There is none.
To make more addresses available for new users (China, worldwide wireless phone carriers), what the IETF should have done before creating this new whiz-bang v6 stack is to convert the multicast and "future use" subnets (no one uses multicast anyway) to standard subnets. Changing all the v4 stacks to recognize these subnets as normal routable nets would yield an additional 536,870,912 usable addresses, and would be a much easier change to implement--would be a simple patch to all existing v4 stacks. For devices such as network printers et al inside the perimeter, one wouldn't even need to change the firmware.