This is about four years old but I wanted to explicitly point it out...
All the attribute-related options on the Options menu (Pens and Colors, Line Types, etc.) use the Ctrl+Opt+Cmd modifier combination with the initial letter of the attribute.
Update: A couple of these (notably materials and composites) broke in AC9 due to conflicts with default shortcuts in OS X. Pens and fills still work. Keep the Attributes toolbar on.