[Joel]

- You will need to create at least one object to get the font size to stick, and at least one connection line for the stroke width.

- Diagram Styles should go in ~/Library/Application Support/OmniGraffle/Diagram Styles/ in order to show up. You can create this directory/path in the Finder if desired, or you can create a New Resource -> New Diagram Style from the File Menu, save it, and the folder will be created automatically by OmniGraffle.