Here's the status message (posting for posterity)<p>"Investigating - It appears Comcast is blocking our domain name and all Comcast users in the USA may be affected. We're trying all available channels to get the site unblocked. Please see <a href="https://community.c9.io/t/cant-access-c9-io-comcast/14834" rel="nofollow">https://community.c9.io/t/cant-access-c9-io-comcast/14834</a> for more information.
Mar 30, 02:25 UTC"