In their own words

"FontStruct is a free font-building tool brought to you by the world's leading retailer of digital type, FontShop.
FontStruct lets you quickly and easily create fonts constructed out of geometrical shapes, which are arranged in a grid pattern, like tiles or bricks.
You create 'FontStructions' using the 'FontStructor' font editor.
Once you're done building, FontStruct generates high-quality TrueType fonts, ready to use in any Mac or Windows application.
You can keep your creations to yourself, but we encourage users to share their "FontStructions". Explore the Gallery of fonts made by other FontStruct users and download them or even copy them and make your own variations.
You can also use the FontStruct widget to show your FontStructions on your own website or blog."

	Why it might be a killer

FontStruct has a very cool interface, the color combinations work well. The site is organized well and gives more than enough information on the application. The gallery feature is a great addition so that users can get ideas of what other people are creating. It is great that users can see how many downloads and comments have been made about the font they created.

	Some questions

It would be nice if there was a demo feature that visitors could use so they could see how the application works before they register. A brief introductory video could also be a way to teach visitors how to use the application. FontStruct could start a feature that could allow users to sell their fonts. It might be fun for users to make a little bit if money from their work.