[northernpenguin]

Um guys, this is a cell phone we're talking about - not a PBX with a T1 feeding it.

The CDMA networks are limited in their ability to conference from the handset - but if you *really* need to conference a bunch of people from the handset you're probably looking at something like Skype or a hosted third party service, rather than a multi-billion dollar retrofit of the North American CDMA networks.