Doesn't matter..being cynical again. I see that adsense reminder stuff from Gorg all the time. BUT, every site will be be different? In my case I have left side nav at 200 pixels and a right hand side leader board with adsense in it with the remaining content in the center.
Fixed container at 1025 or sumthing like that. About 200 words on average in 1024 x 768 show above the fold. One additional small ad in the left nav about 300 pixels below the header. Nothing else until well below the fold.
But then what is considered above the fold. New notepads change all that don't they?