Hi Caroline,
Understand your desire for fancier fonts.
Using the HTML editor I mentioned earlier, I typed my message, then clicked source, and substituted the font name with a font I knew I had on my PC (in this case a font called "wakingup".
Seems to do the trick...
I am not sure it will work with all fonts but so far so good..
Fonts used in this message: Emilys Candy, Dungeon, wakingup, kartika and Arrr Matey (this line is Comic Sans).
PS: played around a bit more and tried these fonts as well:
whoopass
Bistroblock
Dingleberries (dingleberries)
Something Strange
GOLFABET (GOLFABET)
Insaniburger with Cheese
Jokerman LET
LCDMono2 Ultra
My guess is that you can use more or less any font you like, but am not sure if that font will need to be resident on the computer of the person reading the message....