Using the Keyboard Preference Pane, I've assigned shortcuts to the items in the share sheet in the Finder. Command-Option-Control-M for "Email" and Command-Option-Control-C for Message. The keyboard shortcuts actually get listed next to those commands when I click on the share sheet.
But they don't actually work. I've tried relaunching Finder and restarting, but to no avail. Any ideas to kickstart these commands, or is it just a glitch that they even appear in the menu?