The edges of both the MacBook Pro (aluminum case) and the MacBook (polycarbonate) are exceedingly sharp. Depending on my typing position, they dig in my wrists, an unpleasant and painful experience. Can you suggest a solution?
Sanding is one option. Did you perhaps sand-off the edges by using fine-sanding paper made for wood? Could you post an image of the result? It's understood it will not be as pretty afterwards, but being plain ugly is not an option either.
Guards are another idea. People sometime use guards on furniture with sharp features to save their kids when bumping into them. Can you think of a similar product (off-the-shelf or homemade) for the edges of a MacBook?
Looking back at this old question years later I'm puzzled at the critiques of ergonomics. It's a laptop (FHS). You can switch it on anywhere and start typing. It may be the least ergonomic desk and typing positions ever. Coffee shops, for one, do not appear to particularly choose heights for tables with an eye to typing positions, understandably.
Whether polycarbonate or aluminum, the hard edge is painful on bare skin. The simplest solution (maybe this should technically be an answer, albeit a cheeky one) is to wear long sleeves. (If it's just too warm, ) The second-simplest solution is to carry a handkerchief along with the laptop and fold it to protect your skin. Either mimics the suggested glue-on solutions, but avoids ruining the clinically clean closure of a Macbook's screen.
Apple, if You're reading this, chamfer the (expletive) sharp front edges.