I can relate with your burn in fear, as I have a 50" Panasonic Viera plasma and HATE the fact that I constantly have to be on guard over static images, logos, HUDs and whatnot... but over the years I learned how to take care of it and avoid the issue.
That fear also made me nervous when searching for a new TV and I really wanted OLED but then I heard about the image retention on it. I read and studied it a bit but so far it doesn't seem to burn into the display like on the plasma. It's a retention that goes away very quickly or at least by turning the TV off for a few short minutes. One website even let the menu screen of The Fifth Element DVD hang on their OLED for well over 24 hours if I'm not mistaken, and yes, there were clear signs of retention. What would have been a ruined plasma screen, went away pretty quickly on the OLED they said.
Read more about it here:
http://televisions.reviewed.com/fea...creen-burn-in-problems-causes-image-retention
So, I decided to not let that control me too much and went ahead and bought the E6 (maybe should have gone with the B6 but happy with my E6). I can agree it has image retention and very quickly will it pick up static images BUT... they go away faster than you think. The fear, the "bloody hell dangit stupid sh.." monologue I had with myself over the plasma is pretty much gone because so far, what little retention I've seen, is really only temporary. Very temporary, so much so that you really won't notice it much and when you do, you'll forget about it very quickly as it clears off.