Looks like it's back to >5000 for the 360 starting next week. Most likely it will stay in the 1000 to 3000 area until The Last Remnant is released where it will see a similar, but smaller, effect as Infinite Undiscovery and will fall back down to >5000 units a week until Star Ocean 4.
I sense a reocurring theme happening with the 360 getting one big RPG release and beating the PS3 for a week or two before falling back to last until the releases of Final Fantasy XIII, Final Fantasy Versus XIII and Gran Turismo 5 when the PS3 sales permanantly increase.







