It seems everybody's talking about voice over Internet protocol these days.One of the reasons is that talk is cheap when it comes to VoIP -- or at least cheaper. The technology is one that cost-conscious businesses and consumers should be following since, among other things, it can immediately lower the cost of communication services. But it means a whole lot more than cheaper long-distance calls -- VoIP technology is at the forefront of a dynamic evolution in the world of business communications, a move to networks that do it all.