Sunrocket was a VoIP provider that went out of business in 2007. Many VoIP companies reached out to former Sunrocket customers, which, at the time, was an up-and-coming VoIP provider.
Please give us your Sunrocket experience, if you can remember it. You may notice that several of our reviewers have mentioned Sunrocket in the past - that's because they switched to their current (or then-current) VoIP provider after Sunrocket imploded.