Three companies on the move.

PricewaterhouseCoopers writes: "A variety of startups introduced innovative and potentially revolutionary technologies last year, making it an exciting time for telecom innovation. As 2007 kicks into gear, several new telecom products and services are gaining momentum. Three companies in particular--Firethorn, GrandCentral Communications and InnoPath--are offering technologies that people will probably still be talking about a year from now."