Didn't Microsoft's Xbox 360 Elite just drop to $299, like, three weeks ago? Yes, yes it did. Evidently that cut just wasn't deep enough for Microsoft (or else it had a change of heart following the release of Sony's $299 PS3 Slim), as the Redmond mega-corp has today lit up a new mail-in rebate program to bring the cost down to $249. Consoles purchased between today (sorry, Monday shoppers!) and October 5th are eligible, and it's anyone's guess as to