haha I've reached the point where I can see the image in the middle as clearly as the image of the left or right.
However, I had a 3d picture of a hot female model in front of me...so like...yeah...its a lot easier to focus on a hot model than a construct logo ;P
But yeah your eyes dont like being crossed...if the image on the screen is small then its not as painful on your eyes (my screen is 1680x1050) not sure how large my screen is...so yeah standing back from the picture helps a lot but then its harder to see whats going on.
I've seen flicker glasses that come with graphics cards and stuff, the idea being that it blanks out the left eye, and then the right eye, in sync with the graphics card, which renders slightly to the left and then slightly to the right so you get the flickering like in my first layout.
Then theres the blue and red effect, where the left eye can only see one colour, and the right eye can only see the other, but it kinda prevents you seeing colour....also it requires people to be wearing red/blue glasses.
The cross eyed effect is the only one that you can do without the assistance of glasses or a 3d lcd screen..but it hurts your eyes