I just uploaded a new set, "Fonts-Standard", to the HeroMachine Alpha. You now have 21 fonts to use to type in your character name, add a number to a jersey, etc.
The file is very large, 720KB, so be warned. Fonts don't come cheap. You can only apply the line color, the text you type doesn't change automatically as you change from font to font, and it's a little funky to move (the letters get all highlighted and you have to click back in the text field to make it stop).
Down the road, if this is a popular addition, I can add some logic that does at least some of that missing functionality. But for now it's a nice way to add text in to your creation without having to know another Paint program.