The iphones wifi handling is good enough that it really doesn't matter.. you're likely to have wifi at your workplace and at home anyway. Only matters when you're out and about.
Where I live, free wireless is ubiquitous.
Not so in, say, Germany, where it appears that T-Mobile has a virtual stranglehold on hot spots. It's nearly impossible to find free access and T-Mobile charges ridiculous per unit time rates for accessing their hot spots.