Mumble, an open-source gaming voice-communication solution with a focus on low latency, has reached version 1.1.0. This release adds full encryption and support for multiple virtual servers per process; additional info can be found in the project FAQ.
I’ve rarely used VOIP in the past, but it looks like a good solution for games that don’t support voice chat natively (which is pretty much every game on Linux at the moment!).
Download: [ sourceforge.net ]