All right, quiz time: In a single sentence, can you tell me exactly what Google Voice does?
It’s a question even the most giddy Google-appreciating geeks struggle to answer succinctly — and for normal, non-tech-obsessed Homo sapiens, the answer typically falls somewhere between “Huh?” and “Wait, is that the same thing as gChat?”
Really, it’s no surprise. Google Voice is one of Google’s most complex, confusing, and poorly promoted services. But it’s also one of…