They are currently in a nationwide outage for all business and residential services. They are working on restoring service but have no current ETA. You can follow updates on their twitter »
twitter.com/knologyI'm in Columbus, GA and we use them at our office and at home, our IT department contacted them and informed me of this.
edit: they just released a statement on their facebook page: »
www.facebook.com/knology ··· 35613648