We supply our own font for mathematics, called tciuni. In the Control Panel Fonts dialog box, you see four files: tciuni, tciuni Bold, tciuni Italic, and tciuni Bold Italic.
We are supplying only the new Unicode font with Scientific Notebook. Additional fonts, such as those to support calligraphic, blackboard bold, and fraktur, are not supplied. These tags are still recognized correctly—they appear on the screen using a substitute font. The tags themselves aren't be available directly in the .cst files released with Scientific Notebook. You'll see the tags in the Tag Appearance dialog box, but they have been set so that they don't appear on the popups.