MOst specifically Abit and Epox had their heads up their arse according to Nvidia and did not follow the specs that were laid out for them...hence most of the other boards will work even with older bioses still in tact. The Epox and Abit boards need to work out some new bioses, but may be an issue for a person who buys a new venice with one of these boards. There may not be anyway to post properly to even flash the bios. They didn't explain fully if this would be a factor for booting, but since the venice core reviews at xbit showed some boards have minor quirks now, I have to assume these would be more then just minor quirks to gain this type of attention.
To be safe at this time I would avoid buying a new venice core with any Nvidia sckt 939 chipset from Abit or Epox....Who knows maybe bios release will be announced, but one still has to wonder if you will be able to post to flash...