We are facing issues with web hosting since yesterday due to which there are intermittent down times. You may get "HTTP Error 503. The service is unavailable." error on technitium.com as well as bitchat.im. The Bit Chat registration service is also affected.
We are trying to restore the website partially for time being till all the issues are resolved.
Update (25-oct-2016): Issue with hosting seems to be fixed now and things are working.