As Stndrddc posted earlier, the current rumor for the Xbox 360 release date is November 4, 2005. There have also been unconfirmed reports that it will cost $299.99 with games such as Perfect Dark Zero and Project Gotham Racing 3 costing $59.99.
OH, and after surfing the net, I found an interesting picture.

The Retail Box
The price isn't all that surprising as other game consoles were released around this price in the past. As manufacturing costs rise to make and develop games, so does the price tag. Expect to see most, if not all, games to be around $60. There have been other reports that the PS3 will not be cheap (maybe $399 or even $499?)