This other problem is particularly odd: we're expected to find the fonts we need by the name of the font. If you want to display some arbitrary text, you can't just take the range of codepoints you're using, and use it to find appropriate fonts, almost no one seems to index them that way yet. But do see: wikipedia Unicode_font
(On the other hand, css3 has some interesting features to specify which fonts to use for different codepoint ranges, but that's a different feature.)