The AVR-890 and AVR-990 both feature Denon's newly designed GUI with overlay via the HDMI connection, and the AVR-590 and AVR-790 both feature Denon's new enhanced icon-based OSD.

ENGADGET: Denon outs 2009 line of Blu-ray players, AV receivers and headphones

Perhaps the coolest feature is the link map, triggered from an icon at the top of each article page.

WSJ: Encyclopaedia Britannica Now Fits Into an App