Several sources told me that yesterday Packet8 was experiencing outages. Apparently it was due to server issues. Sounds to me like they need to look into standby systems, clustering, or some sort of better redundancy than they are currently using.
Here is Packet8's response they sent their customers:
On May 12 and May 18, server malfunctions within the 8x8 internal network led to partial network outages which interrupted Packet8 service for many subscribers.
In both cases, 8x8 engineers identified problems with the servers and immediately allocated resources toward resolving the issues as quickly as possible. We apologize for any inconvenience this has caused you, and thank you for your patience and understanding.
As with many communication networks, occasional server outages do occur and are painful for both the provider and the subscriber. Please be assured that service reliability is a top priority for 8x8 and that we will continue to devote significant resources toward achieving excellence in service quality, performance and customer support.