We thought you would be interested in the following projections from Instat:

The global consumer VoIP market grew from approximately 16 million in 2005 to over 50 million in 2006. In-Stat forecasts that by 2011, 38% of broadband households worldwide will subscribe to VoIP services. Consumer VoIP revenue will grow from $15 billion to nearly $44 billion over the next five years.