How often can you find wi-fi networks around Boston?

[Ambrose Chapel]

I'm nearing the end of my current mobile contract and am considering an iPhone or an iPod touch. I'm curious as to how often current users are able to find an open wi-fi network in the Boston/Cambridge area to use instead of the cell network.

Thanks!

 

[skubish]

http://www.jiwire.com/search-wifi-hotspots.htm?technology_id=0&venue_group_id=0&city_id=0&disableBrowseBy=false&type=&latitude=&longitude=&country_id=1&state_id=20&city=boston&zip=&result_display=map