Hi,
Recently I was invited to do a podcast interview which hasn't happened yet and discovered that they use the 'mumble' program for live audio chatting, when I went to install mumble from the Squeeze repositories I discovered to my disappointment that it wanted to pull in PulseAudio which was a definite no-no. So long story short I have modded a mumble package so it doesn't call for PulseAudio as a dependency yet is still fully functional with ALSA. This package should be good for AV Linux 5.X and 6.0.
For anyone who might be interested I put up the package here:
http://www.bandshed.net/custom/mumble_1.2.2-6+squeeze1_i386.deb