Clicked on my link for his squad builder and got a "HTTP 404 Not Found" alert.

It works for me (Google Chrome, Windows 7).

http://geordanr.github.io/xwing/

voidstate may be down at the moment, but it was just updated recently so it's not gone

If you're using the old web address, then yes. If you're using http://xwing-builder.co.uk/build then no, it's fine.

I'm into the page too, so maybe your navigator don't read, greettings.