I have it and played it a little and once internet speed goes back to normal i'm on it. Night time fuck yeah.
I just downloaded ARMA 2: Free from steam. Now I'm waiting for dad to get home so I can use his paypal to buy the expansion pack so I can use DayZ
ARMA 2 is free - but I believe you have to buy one of the expansion packs (Operation Arrowhead) for 20bucks to make the DayZ mod work.