We check this website, now i3wm.org is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is i3wm Down Right Now? - NO! i3wm is up!
If you have problem with access to site i3wm, and domain i3wm.org is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).