Wife and I each have new Sprint HTC Hero. We also have a home wifi network using an older (pre-802.11n) Apple Airport Extreme base station as WDS main and an old Apple Airport Express as a WDS remote. When we're home we tend to turn on our phone's wifi. As long as only one phone has wifi turned on, everything is fine. But within minutes of turning on wifi on the second phone as well, our wifi router starts to lose it. Apparent massive interference. After a few more minutes the router becomes catatonic, so much so that Airport Utility cannot even see the router at all. A power cycle of the router fixes things for at most a few minutes, then it rapidly goes downhill again. Turning off the wifi on one phone (doesn't seem to matter which one) and power-cycling the router brings back perfect sanity until the next time wifi on both phones is turned on. I have neither the time nor the energy to go through the inevitable denials and mutual finger-pointing with Apple and Sprint, but I thought I would make note of it here for the benefit of the community.