I'd be glad to voice act for a good FOSS game.
Here's an example sketch I made for Open Dungeons http://opengameart.org/content/voice-ac ... n-dungeons . And another one for STK http://opengameart.org/content/airport- ... acting-stk
I fluently speak English, Russian and Ukrainian.
It's free, but the project must be interesting for me. I prefer CC-BY-SA, but it's discussable.