I think he's referring more to stuff like teamspeak and ventrilo. I tried to install teamspeak on my installation and it was having problems not sure if anyone else has been able to get teamspeak working on core 5 yet or not though. I'm thinking we need an open source VOIP teamspeak type solution.
OS: Fedora 19 (x86_64), CentOS 6.4 (i868)
Laptop: Lenovo G530, CPU: Intel Pentium Dual Core T4200 2.00 GHz, Ram: 4GB DDR2-667, Hard Drive: 500GB HGST 7200RPM, Graphics: Mobile Intel GM45 Express, Wireless: Broadcom 4315