We check this website, now 8x8.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is 8x8 Down Right Now? - NO! 8x8 is up!
If you have problem with access to site 8x8, and domain 8x8.com is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).