Thanks for the quick replies:
dfergie: Yes, the picture looks quite a bit like that, the whole picture will freeze with major pixelation, and then just sit there frozen until I leave the channel, wait a while and come back. I wouldn't be quite so concerned except it did it 4 times in about 2 hours of playing with the unit, so if that is average, I am NOT going to be happy and the wife acceptance factor is dropping dramatically. It didn't seem to need a ticker on the screen, or any kind of change of picture, it would just freeze.
bhelms: I IM'd my wife at home, and had her check the serial number and the temps. The serial number ends with an E, so I guess I have the latest version.
The temp numbers were 136 high, 111 average, and 78 low. The 136 high does seem high, but the average 111 seems right in line with what most people were posting on that other thread.
I do have the unit in the TV stand, but it is on its own shelf with a VCR and DVD player underneath that shelf, currently turned off. It has about 2 inches of space above it, and feet of space on the left and right and to the front, as there is no front glass. The cabinet is open on the sides too, so it should get enough air.