Last BF the 360 sold 475k in NA and 236k in OTHERS.
The previous weeks sales for the 360 in OTHERS was 200k. 10k higher than PS3 sales this week in OTHERS (same week last year)
PS3 black friday should be about the same as last years 360 (with Japan taking the slack for NA)
SO I say the PS3 can match the 360 2008 sales a week before christmas, + whatever Japan can summon. 880k + Japan week before christmas? It'll sure come close.