If your grandmother's Facebook account wasn't a tell-tale sign that the internet has come of age, here's another: after this week, the internet will run out of new IPv4 addresses. But don't fret, because we're moving on up to IPv6!
Every time you buy a domain name like io9.com, it's given a unique numerical IP address on the internet. But what happens when the well of numbers runs dry? We're about to find out.