http://www.macnn.com/articles/11/01/07/tech.now.costs.50/
Denon, Marantz audio hardware gets AirPlay update
updated 01:30 pm EST, Fri January 7, 2011
Tech now costs $50
Selected Denon and Marantz audio hardware should now finally support Apple's AirPlay streaming technology, as promised, the two companies say. Supported Denon receivers include the AVR-4311CI, AVR-3311CI, AVR-991 and AVR-A100, as well as the N7, a combination networked CD receiver and two-channel speaker system. Compatible Marantz gear includes the SR7005 receiver, AV7005 preamp, NA7004 network audio player and M-CR603 networked CD receiver.
AirPlay support has been promised by the companies for some time. It was also originally supposed to be free until November 7th. Instead, existing Denon and Marantz gear owners must pay $50 for a downloadable upgrade.
Fresh-Faced Recruit
Joined: Feb 2009
Audio Only
As best as I have been able to ascertain, Denon's Airplay implementation only supports audio, despite most of the devices being A/V receivers.
Jim