Actually valhallen...it depends on what you tell flash to do with the text. If you just convert it to a symbol, it still won't show up on computers that don't have that font. If, when you create the text and tell flash to export the font with it (it isn't put in those words..but i'm sure there is a tick-box in the text pannel), then yes, you'll see the characters on the computer. But that will have a considerable effect on the size of the .swf file.
What i think you want to do is, type the text/characters in, turn it to a symbol (as valhallen suggested), the click modify ---> break apart. That will turn the text/characters into vectors, which will ofcourse be viewable on all computers with flash on them.

Cheers!