Vent... aka Ventilo. A VOIP (voice over ip) type of application that is not part of POTC, and is externally hosted. This allows those connected to actually talk to each other (beats typing by a mile!!!)
A Ventrilo voice server will cost some bucks, not alot necessarily, it generally depends on how many slots you want (how many can connect at one time).
There is another well known similar application called "TeamSpeak", if you have the bandwidth (and no, most standard home owner ISP accounts will NOT suffice) and a computer to host it, this one can be run for free, but not only requires the aforementioned bandwidth and host computer, but also the know how.
Go to
http://www.ventrilo.com/ they list thier approved/licensed hosts or google "ventrilo hosts" and you should find a number of links to information/pricing from various competitive hosts.
Zeppers lvl 40 - All mastered but lvl 21 cannons
Groggy McJones lvl 26 - All weapons quest/tp quest finished - avoiding story quest
http://pirates.teamofx.us