Anyway, yeah. DayZ. This has been getting pretty popular over the last week or so.
What you have to remember is it's not even alpha. It's buggy as all hell. It's a miracle the damn thing is as stable as it is. It also requires you to buy a $20 game to play it. The install is also more complicated than your average mod.
It does however look potentially hilarious.
I'm going to wait and see how this mod develops. If it's still going in a year's time I think it'll be pretty amazing.