Mac Fanatic wrote:
slouching puts your outer palm directly on the edge.... ouch. bummer.
My last MBP 17" from late 2008 did not have this sharp edge.
I put my outer palm directly on the edge most of the time I use my MBP... and while certainly there is a 90° angle, it does not hurt my hand, even after a few hours of using it.
I would recommend taking your MBP to an Apple Store and see if they will replace it. (or at least go to the Apple Store and see if the edge on the display models hurt your hands too, as recommended earlier) I think this is a factory defect.