I use the Sonos bridge and it works perfectly! In fact if you have (or purchase one on eBay or gazelle) a zone player (ZP-80), you can both get wireless support and send DK songs from Sonos lists directly to the Disklavier so it's controlled by you Sonos controller of choice. I've ripped all of my CDs to .WAV files, stored them in an iTunes list on my PC or home server, made a Sonos playlist of my favorite DK songs and control the entire night's of music with my Sonos system from anywhere in my home.
enjoy!