Looking at the OM-D it sure looks like the E-P3 with a hump--similar dimensions, similar heft. Any idea why Olympus didn't design it with an exchangable grip, like the E-P3? An optional larger, beefier grip sure would have addressed many people's gripes with the camera. Heck, they probably could have just designed it to accept the E-P3 grips that are already in production. Just a random brainwave . . .