It’s this big (as of November 2008):
We’ve featured maps of the Second Life grid before, and they’re useful to reinforce the scope of virtual worlds. Those who haven’t spent time in a large world have no concept of their size and complexity until shown something 2D like the map above. Combine it with a brief tour of Second Life and the penny starts to drop.
Back in November 2007, Second Life was roughly the size of two Wagga Waggas at nearly 900 square km- it’s grown a lot since then to 1871 square km, which isn’t that far off the size of the Australian Capital Territory at 2400 square km. That should also help provide some mental imagery for the skeptic.
Thanks to New World Notes for the heads-up