Twitter's own link shortening service t.co seems to be experiencing a few troubles right now. The service seems to be down meaning that any links posted to Twitter won't resolve when you click on them.
Update: Aaaaaaaaaand it's fixed. That didn't take long. Nice one, Twitter.
We first noticed the issue a little while ago and since then, reports are cropping up from the likes of The Next Web with similar symptoms.
No word from Twitter yet but we'll keep our ears to the ground for you. In the meantime, enjoy the t.co-pocalypse.