Mumble actually does seem pretty nice. O: I just installed it on a whim.
Questions: If I run Fraps, would it record the sound from Mumble, as well? Also, does Mumble have a record feature, so that I could overlay its audio on top of video (and its audio). Also also, how do I get the voice detection to work properly. It says it's supposed to stabilize in yellow, but no amount of fiddling will make that happen. The jump from "silent" to "talking" is way too large and yeah.
EDIT: I just remembered once I was listening to a podcast and fraps recorded that in the audio, so I guess the answer to my first question is "yes."
EDIT EDIT: My biggest problem with using external programs is that if I later want to Fraps a demo I recorded (as demos are much smaller), I then have to make sure to sync up the vocals with the video, which is not an easy task for someone like me who doesn't know much about video editing at all. Any ideas to make that easier?