I'd rather save on no data with my 32GB WiFi using it at home and lug my iPhone around in my pants pocket.
But your paying more than one lugging only an iPad.
iPhone and iPad Wifi = $83 - $140
iPad 3G = DATA plan $30 + Skype $25 (yearly) = $30 a month + the added $25 (yearly)
Having only the iPad 3G saves you money if your willing to lugg the iPad around. And heck you can get a Go phone if you want a pocket phone. and use the iPad for all those iPhone/iPad apps.
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		