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