Stephen, for some reason I thought MyFonts and FontShop do not support kerning. Indeeed, both do. I am not very optimistic about a fast-enough workaround. It would mean to kern the pre-generated jpg/png images of individual letters. That is, to translate all kerning metrics to pixels for each type size used. There is also need to avoid overlaps of the white bits with lettershapes (i.e. support transparency). It is just my simple guess, but it does not seem worth it.