Actually, it's ogg vorbis files in there, but same end effect. You can get them on a music player pretty easily, or at least you can convert them if your music player doesn't support ogg directly.
Pablo and I are both really looking forward to the release of the newest batch of AI War stuff, when 4.0 comes out. The AI War base soundtrack is completely remastered now, and he's working on the CON soundtrack as well as remastering the Zenith soundtrack. I'm a huge music fan, too, and I think you'll really love what he's done here.
Regarding the beta date for CON, we're running about three weeks behind. I expect that might either be sometime around the 30th of this month, or else around the 6th of August. Hopefully we'll have the full CON/AI War 4.0 out by the end of August or middle of September, but it's hard to be sure at the moment. I'll be off for three weeks of paternity leave at the start of September or thereabouts (depending on when the baby really arrives), so that complicates things substantially, and could set us back another three weeks if the 4.0 version isn't done first.
At any rate, all of the art for CON is done now, the maps are about 80% done, some new AI features that will be used in CON and outside of CON are maybe 60% done, the music is 1/3 done, and the rest of the programming beyond maps and the partially-implemented AI addition is 0% done. But once we get a chance to actually work on it more, I think there's only a week left before we hit beta on CON. I just don't know where that week will fall, if it will be the week of the 26th or the week of the 2nd.