http://www.ericsson.com/developer/sub/op...

"IMS is the Internet Protocol (IP) Multimedia Subsystem defining a generic architecture for offering Voice over IP and multimedia services. IMS was first specified by the Third Generation Partnership Project (3GPP/3GPP2) and is now being embraced by other standards bodies, including ETSI/TISPAN and Cable Labs. Multiple access types are supported, including 3G mobile, wireline broadband access with WLAN endpoints.

IMS-based services will enable all-IP person-to-person and person-to-content communications in a variety of modes - including voice, text, pictures and video, or any combination of these - in a highly personalized way."

[This goes to our discussion about "it's all IP"...]