iPhone has both phone function and data capability over both 3G and WiFi. iPhone device however requires a monthly higher subscription charge for the data plan. BlackBerry devices support voice and data just over 3G services and the data plan is $40 a month. iPod touch supports data and VoIP over WiFi, no subscription charges and no phone support. Now does that leave a whole in the market for a device that supports 3G Phone + data over Wifi? It is an easy addition for Apple and will a gap in the market that needs iPhone’s capabilities without a higher monthly subscription fee.
Now that’s a device I will buy.