IPv4 address exhaustion will hit everyone hard within the next three years. If you’re doing any kind of IT, implementing IPv6 is a shitstorm you’ll be forced to deal with.
Sam Bowne at the San Francisco City College did at talk at Defcon this year, in which he explains a lot of the essentials on getting started with IPv6. Mr. Bowne is hilarious so the talk is very much worth its 27 minutes.
Short version: take a look at Hurricane Electric’s free IPv6 certification program.