I'm very interested in the Sharp OTC microwave (although I wish they had a convection option, too). Their web page for it:
over the counter microwave oven | R-1214
shows it installed under a corner cabinet. The only text about how to do this is "The OTC can be installed in a corner location using standard 27 in. wall cabinets and custom trim mounting." It normally fits under a 24" cabinet on a straight wall.
Since I find those big corner cabinets a huge waste of space anyway, I'd love to do something like this, but what would go over it?