If your bored try armed assault ( arma) - the islands are 20km x 20 km and it takes ages to even fly across it in a helicopter.
Check this video out is actual captured in game footage.
This is so weird, it looks nothing like ArmA on my PC. ArmA Demo as I remember it runs 20fps on quad intel with 8800GTS and looks like a bad beta version of Operation Flashpoint. Wasn't that why it was such a spectacular international failure?
Video looks great, was there like a large patch or something to make it look and run so smooth?