One of the attractions of Proanimator is it can animate more than just text, it'll also do logos but they have to be Illustrator files and many restrictions apply to what can be in the file. It's limited to a closed surface basically.
Putting my thinking cap on, that's just what a font is, a 2D surface defined by vectors. So I can see no fundamental reason why Protype couldn't be fooled into animating any 2D surface that it thinks is a font. I'd assume it can already do this, there's plenty of WingDing things around and I haven't tried animating them in ProType as yet but I assume they will work.
So the next step is how to make our own WingDing like 'fonts'?
Once we can do that, ProType seems much more interesting.
Bob.