I'm running XP 32bit with SP3, an XFX 8800gtx "not overclocked", EVGA 680i motherboard "AR Version" and 4gigs Corsair Dominator 8500. I have all settings on high and anti-aliasing set to 4x and the game runs perfectly smooth.
When I originally installed the game I had Comodo Firewall Pro on my system, there is some sort of conflict with Comodo and Demigod. I uninstalled Comodo and the game loads fine now, hopefully there is no conflict with any other firewall programs.
As to the realease date, I bought my copy of Demigod on 4/10/09 at Best Buy. I first drove to Game Stop and saw it there and had them put it on hold for me, then I went to Best Buy "for my reward zone points" and asked someone if they had the game in stock, the clerk checked on his computer and said he had 10 in stock and went in the back, found it and gave me a copy. He did say the release date was the 14th but he still gave me a copy of the game.