MetroPCS has come up with a novel -- and long overdue -- concept where push-to-talkers can now irritate wireline subscribers, too. Kodiac Networks, which is behind the ChatLink service has stated this is the first system that will see PTT extended to users without a client. MetroPCS subscribers will now have the ability to create a friends network of up to 10 people and by simply hitting any key on their phone will be able to join in the push-to-talk fun. The service is set to cost only $5 per month, so what you waiting for, Unlimit Yourself.