For $5/month you can now get unlimited push to talk through Verizon. The offer works with an application you install from their Verizon application centre, once you download it you need to call Verizon and have a representative activate it for you.

Some key features in this service are:

• Make quick exchanges.
  Push one button to contact team members or clients.
• Place group calls.
  Hold conversations with as many as 50 total participants.
• Check team member status with Presence.
  See who is available for a Push to Talk call.
• Manage contacts for the entire company online.
  Add, delete and assign contacts, create groups and more.
• Use one number, one device.
  Make and receive voice calls without needing a second device or phone number.
• Enjoy coast-to-coast coverage.
  Connect on our nationwide broadband network, and get expanded coverage across the United States within the National Enhanced Services Rate and Coverage Area.

There are a few cons with the service. You need a PTT enabled device and roaming won’t work.

To find out more about Push to talk visit their website.