Verizon Mobile recently launched the "Hub", a family communications command center, a desktop touchscreen device installed with VoIP capabilities and the ability to connect wirelressly to multiple wireless handsets.
The Hub's voice service is purely VoIP and acts as a center point for household with multiple wireless handset users.
More information about this product and a lot more can be found in this news article from BetaNews.com
Link: Verizon launches its VoIP and mobile-bridging 'Hub' | Betanews