Here is a guide to Unicode symbols in Furcadia, programmed by Mandaliet. (Of course, this works in regular HTML too.)
Furcadia has added limited support for Unicode, which means that you can now use all kinds of crazy symbols. You can read about Unicode here. However, not all of the symbols work in Furcadia—in fact, most of them don't—and depending on your computer, you might not be able to see them all here.
Instructions: Find the symbol you want. Click on the code in the input box next to it. Copy the code and paste it into Furcadia.
See here to do easy backwards writing, and here to do easy cursive writing.