I have 360 on everyday and sometimes just leave it idle.. its built nov 2006 and still going.. been serviced twice but still no "full" RRoD..
I did get a RRoD from FFXI a few weeks ago and the machine switched itself off ... I turned it back on and it just went back to normal and I carried on playing FFXI for another few hours.. I think that was during the weekend when I had the 360 on for like 20+ hours continuous







