Might be a good idea to migrate this to http://forum.audioboo.fm. Has he uninstalled and reinstalled the app, yet? Can he reach audioboo.fm from safari on his iPhone?
"Can he see the feeds under 'browse boos' or record anonymously?" Neither. An connection error comes up on his iPhone despite everything else connection on his device and I can connect on mine.
Happens over 3G and WiFi.