Hi,
just out of curiosity, if anyone is interested in having an audio line next to IRC, I've just set-up a conference room (mostly out of interest how it performs) for #tdf-infra at:
+49 89 20008761663
PIN: 1337 (sic!)
Really just an experiment, nothing official or permanently, weird idea of mine - but let's see how it goes. 
If it proves to be working, I'll migrate it to our official confcall system that also offers international numbers.
Florian