Yes my Xbox is freezing during the campaign mode, It froze for about 5 seconds, and then came back, and continued to play. So far it has happened 5 times. The biggest incident was during 1/16 on the return to the base with Kat, with the battle of the three C.Corvett & a ghost. My Xbox is a Falcon chipset, with a 120GB hard drive with 70GB free. it is connected via HDMI and duing 720P. The Box is on top of the entertainment center with open air. The exaust from the system is 101 Deg F. The game is installed to the HD.
So its not just the launch consoles, as my falcon box is Freezing up.
[Edited on 09.18.2010 6:54 AM PDT]