rig: quad Q6600 3.30GHz, 4gb, 280gtx, windows 7
On everything maxed @ 1900x1200 i get around 26-40 fps, maybe time for a new graphic card :D or at least that will be my excuse!! ARMA 2 is amazing about 2 hours into the campaign and have to say not had any problems so far.
I got the map at around 17:30 today so i would imagine you should get it soon