Today the IPv4 counters show there is 1 year left for IANA IPv4 depletion date or X-Day !
Note that this is a conservative estimate as a few months ago the prediction was October 2011. A less conservative estimate taking into consideration exponential growth of IPv4 demand on a regional level shows April 2011 for X-Day, more at http://ipv4depletion.com/
One can download the depletion counter gadgets for Win, Mac and iPhone from http://inetcore.com/project/ipv4ec/index_en.html
Any ideas or plans for events to mark this end of an era ?