September 20 2007: AT&T will be releasing a WiFi Blackberry, making two handsets the carrier now offers with WiFi/cellular dual functionality. This raises the ante in the WiFi versus femtocell war, putting AT&T clearly in the WiFi camp. The WiFi capability means that the phone will roam (via UMA) to home, business, or hotspot WiFi and it offers WEP/WPA encryption options as well. It seems pretty clear that the US market is moving toward a universal home/roam strategy, but whether it will be based on WiFi or femtocells may depend on Verizon. So far, we’re not seeing much in the way of CDMA femtocell approach, so it may be that Verizon will side with AT&T here.