No I cannot host now that I am back in Korea, as it would be too high a ping. Requirements? Hm, not sure. Typically you need about 128kbps upstream per player (so 512 would be 4) and some 2ghz of processing power. A PPS setting of at least 12 and FPS cap of 999. Also you need to allow all objects and it is recommend to place all custom OOFs in your D3 directory while hosting. No time or goal limits should be set. For co-op support, simple modify the .msn or download the one in the forum.
The Expanse. Watch it!