Filed under: GamingSince Microsoft apparently didn't suffer enough indignity with the whole J Allard-in-dreads happenings -- we were sure our caption contest sealed the deal -- another Xbox exec has gone on record making predictions on Sony hardware, unfortunately without similarly high stakes. Xbox director of technical strategy Andre Vrignaud is betting a steak dinner with the staff of Level Up that Sony's going to hit the market with a $399 PS3 SKU by Black Friday 2007. His thinking is that Sony won't want to stick with a $599 80GB PS3 as its sole offering, and there