I am very interested in this because last week I purchased a panasonic tc-p60st50.
I was disappointed to find that there is a green tint to any white or gray screen when I was running calibration slides. Then after seeing it I started noticing it on commercials and blue ray menus. There is much discussion on this subject and I have been told that it might go away.
Here is the pic:

Now, not seen in this picture, I have also noticed a dark band about 4 pixels wide developing on the right side of the screen which can be noticed if you turn down the contrast (if contrast is high you cant see it).
I am continuing to aggressively "age" the panel to see if these problems get better or go away. I already called Best Buy and scheduled a pickup for return this Friday. Unless the problems go away by then I am returning this set.
I still want a plasma and this set is the direct competitor to the Panasonic I bought. I was hoping that Samsung plasmas had less "lottery" to them and were more of a sure bet on getting a good one.
If there are uniformity issues with the Samsung as well then it will affect my decision on which whether I try another Panasonic or switch over to Samsung.
Your input would be appreciated.