http://chat.stackexchange.com/login/globaldoesn't log me in. It just sits there trying to connect to something, and eventually gives up on that and does nothing else.
http://chat.stackexchange.com/helpsays I can't connect to stackauth.com. That test fails in both Firefox and Chrome. All the other tests pass. This isn't an iframe issue as I don't have anything that blocks iframes. In fact, I simply can't connect to StackAuth.com. Here's an image of it 404ing in Firefox and Chrome .
I tried the chat-stackexchange-login button approach: in this case, http://gamedev.stackexchange.com/users/chat-stackexchange-login. I accessed that page just fine but when I click the button I get an express route to an error page courtesy of Picard and his crew.
So now I'm here writing this out. I don't think this is a one-off issue. I remember a month or two ago I couldn't log into chat either - the login page doesn't do anything (just like now) but at that point I didn't look into it further.
I'm located in Brisbane, Australia.