is it http://www.tellme.com ?
they use voiceXML
But that doesn't appear to be voice chat, rather voice recognition.
Are there open standards for voice-over-IP, as there are for video-over-IP (H.263)?
I would guess that all that's necessary is to send a jabber:x:oob attachment giving your IP address and port number, and then the receiver connects using some standard voice/video protocol. But what would the protocol name used in the URL be?
�Jens
