Enterprise: Ready
Consumer: Coming
SMB: A few
Mobile: Waiting

Vendors discussed/cited:  ADTRAN, AudioCodes, Avaya, Cisco, Gigaset (Siemens), ooma, Polycom, snom

Enterprise: Ready

You don’t have to try very hard to find G.722 support for enterprise-grade IP phones. All of the usual suspects have G.722 codecs in one or more of their handset lines.

Avaya says all of its handsets already support G.722 while [...]