I think It's too close to call, but I have faith in the 360 edging the PS3 world wide.
BTW this week at Wal-Mart (well Saturday to be exact) they are throwing in a $100 gift card with the 80 gig PS3 - making it esentially $300. So next week the PS3 might edge the 360 in the US if everyone jumps on that.
It's just that simple.