How are you spending less money? Do you mean iPhone w/ voice+data plan vs iPhone w/ just voice plan, or iPhone w/ just voice plan vs iPod Touch w/ normal phone w/ just voice plan?
iphone with voice plan
vs.
iphone with voice plan, plus data plan
I have my internet connection at home in the mornings, free wireless at the library in the afternoon, free wireless at my fiancee's in the evening and free wireless when when I'm at the coffee shop in between.
I was countering the statement that an iphone is useless without a data plan. There was a time when I really could have used a data plan and that time will come again. At this time in my life, as you can see, I have virtually constant access to free wireless and a data plan would be nearly useless to me.
I'm not making a blanket statement, rather I was responding to one.