I think the purpose of using Twitter for service interruption announcements was to provide a communication source that is not affected if Voipo has a catastrophic failure that disables the Voipo web site and the Voipo forum.

I don't own a cell phone and have never used Twitter to send messages, but I do subscribe to the RSS feed from Twitter for Voipo announcements. The Voipo announcements arrive in my Outlook mail just like other emails.