Yes, Verizon Wireless does Push to Talk too -- With the Motorola Adventure V750 phone you can have walkie-talkie direct communications with one person or a group, in a rugged flip phone design with a no-slip surface, meeting military specifications for conditions including shock, vibration, dust, and temperature.
Plus, the Adventure is a full-up multimedia phone, with speakerphone, 2 MP camera for photos and video, music player with play buttons when flipped closed, VCAST Music and Videos, and microSD slot for up to an additional 8 GB of storage.
It's fully connected, with Verizon's EV-DO Rev. A wireless broadband service, with Mobile email and Web. And it's location aware, with VZ Navigator for maps with turn-by-turn directions, Chaperone to locate a child's phone from the Internet or your cell phone, and Field Force Manager for businesses to locate and communicate with mobile field workers.
The Adventure is available for $169.99 with a two-year contract.
See my Mobile Communications Gallery for more on cell phones.