Thats a shame. It would be so handy for people interested that are over sea's.
PSTN rates can be quiet expensive when ringing abroad. And considering the theme of the site it does seem a little behind the times not to be offering VoIP access.
Also I did try via PSTN a couple of times and everyone complaned that my audio was too quiet to be heard.
I couldn't find any volume controlls within the conference via the DTMF keypad, so yet another dead end.
OH Well. See what happens.
.-.-.