I'm aware this is not quite a resource - yet - but maybe with a little bit of work it could be. Basically, I've been messing around with the sounds.pbo in the ArmA addons folder, unpacked it with cpbo and took a look inside. Most of the files in there are encoded .wss format, thus rather useless (and besides just a lot of general environment sound), but when I went to the missions folder, I found a bunch of voices, in .ogg format with ready-made lip synchs and all for several different people (Brian, Dan, Dusan etc) plus a lot of generic official campaign-related chatter. Semi-useful as this is, the best I found was when I went into the individual people's folders, and started listening to the voice clips there. Radio and normal "shouting" voices, Faaaar more immersive and believable than the robotic-sounding "All, Flank, LEFT!" or "Two, Engage, That, OFFICER" sound files for a lot of different situations - flanking, taking cover, attacking, cursing, fire in the hole, etc. Exactly the kind of thing needed to make the enemy, and friendly, forces seem more alive - take the ECP mod as a shining example of this, with your own units and the enemy providing believable battle chatter (from the shouts of "Grenade!" to "Enemy armor!") that really improved immersion by cartloads. Check them out, many nice clips in there. Also some less-than-politically-correct words used.
Anyway, since sound-editing is not my thing, I was wondering if anyone here's figured out a way to get to them, without having to individually unPBO, remove, make description.exts, and add to each mission we make? Seeing as they're all THERE, they're just not being USED, it'd be absolutely rad if someone figured out some nice way to access 'em directly from a script or somesuch.
And, if not, at least you're now aware of these voices being there, in case you want to use them for some of your missions.
Will be experimenting some more with these in the future. Yus.