Internet Full
ARIN, the regional registrar for North America estimates that IP address exhaustion will happen this year. Although predicted since the 1990s (and planned for, with the IPv6 standard since 1995-ish), only about 1% of internet hosts are upgraded to IPv6 (which doubles the address space in such ridiculous overkill that nearly every atom in the universe [by rough estimates] may have an IPv6 address assigned).
Hey, maybe they're just dawdling so they can get some free military "networking" equipment (wired.com).