"font servers are the problem here, making several requests to download not only fonts but also js scripts."
Right. You no longer need Javascript to download fonts. You don't need multiple versions of the font any more, either. TTF, OTF, or WOFF work on everything current.[1] Early iPhone models (IOS < 4)only accepted fonts in SVG, which was strange, but now they're on board.
If you need to convert from one font format to another, see [2].
Font squirrel lets you do custom subsetting, so you can generate a tiny custom font with only a few characters. I do up exactly that with Font Awesome, so I'm only getting the characters I need.
Right. You no longer need Javascript to download fonts. You don't need multiple versions of the font any more, either. TTF, OTF, or WOFF work on everything current.[1] Early iPhone models (IOS < 4)only accepted fonts in SVG, which was strange, but now they're on board.
If you need to convert from one font format to another, see [2].
[1] http://caniuse.com/#feat=ttf [2] http://www.fontsquirrel.com/tools/webfont-generator