[pjb]

Pages has a super/sub/script command which moves the baseline and changes the font size. Is that available for adoption into other Cocoa apps? Is there an Automator .service or AppleScript out there to do this already? I have services to change letter case; seems a small leap.

after more thinking...it may not be such a small leap since many fonts have special glyphs for superscript and subscript characters and what we're expecting is a cheap alternative and probably not what Pages does.