I've been using Area 51 for some time, but recently was curious about the name itself. I've read the discussion about the upgrade, which would result in "Area 52". So, what is the meaning of the number 51 in the name?
- Is it a version number?
- Is it the 51st site launched by StackExchange?
- Is it "51% progress", so the lowest number more than half?
- Has this numer any other special meaning?