Interesting service, and very well executed. The one problem that I have with pictograms-as-fonts is anti-aliasing. The designers that I work with spend hours to make their icons absolutely perfect at every pixel size that they'll be displayed at. This is particularly visible when the icon has horizontal or vertical lines. Most of the time you'll want them have a hard edge, and with anti-aliasing you can never be sur…
You can use this CSS rule to make them look like Photoshop: -webkit-font-smoothing: antialiased; only works in webkit, which is most all mobile and chrome/safari.
This doesn't seem to work in Chrome on Windows; do you know of any workarounds there? That's not really a small market segment anymore, and I'm not sure I could sell our design team on font icons without a viable solution.