Good link Joe.
Plasmas have gotten a lot better with burn in just as LCD's have started closing the gap on off angle viewing and black levels...
For quick reference:
Lots of gaming and rooms with a lot of light and direct seating go with LCD.
For the best blacks and picture quality in rooms with good lighting control go with Plasma.
Couple important things to remember from the article:
Keep your contrast and brightness levels less than 50% for the first 100 hours. Also avoid the black bars and static images. This will tame down the phosphorous a bit and give you a more uniform breakin. After 100 hours you can boost your levels, I recommend using a calibration disk like Avia or Digital Essentials to set up your black and white levels
...Don't forget the "temporary ghosting" effect mentioned in the article. Often times if you watch or play something with a static image for a short period of time you will see that image burned in on your screen when you change channels. In most cases this is temporary and switching to a full screen program will clear it. Just don't want to get the Burn in confused with temporary ghosting.