Roamio's WiFi drowning out other devices

I had my AppleTV and Roku on top of my S3, right next to the S3's Wireless-G adapter. They all lived together in harmony.



However, I now have these two devices atop my Roamie, and now neither one of them can connect to WiFi.



Is this a known issue with the Roamio, or should I contact TiVo because my Roamio contains an out of spec WiFi component?