Whilst the icons themselves are nice, clean, and tidy, the fact they're the wasteful SVG when monochromatic is a bit of an issue, as is the extra handshakes.
I'll try to remember, but if I have time later I'll toss those into a webfont so as to reduce the handshakes by one and shrink the overall code further. I'm thinking map them to /u2197 and /u2199 so they even have webfont off fallbacks.
something like:
.internal:after,
.external:after {
font-family:"link icons",sans-serif;
padding-left:0.3em;
}
.internal:after {
content:"/u2199";
}
.external:after {
content:"/u2197";
}
Not counting the webfont @font declaration of course.
Hmm. I wonder if we even need a webfont for this.

Border and some creative use of text-shadow could work wonders.
There's something about SVG that just bugs me... maybe it's because its creators -- M$ and Adobe -- basically abandoned it at birth 18-20 years ago... maybe because being XML it's a painfully inefficient way of storing vectors... There's something else about them though, something I can't quite put into words. They FEEL dirty.
Still, nice clean easy to see icons. I love vector icons.
(in case you couldn't tell from the use of font-awesome in the current template skin.)