It would be really freaking awesome if I could get WP7 and not have pay $40 a month minimum for VOICE service I never use! I need prepaid WP7.. PLEASE!
I have a windows phone 7 with just using wifi you don't need a sim card or data plan to start it up. Once you boot it up just turn on your wifi and you can go the marketplace and surf the web.
This. You might be able to get one off Craigslist (eBay prices were all high).
I keep my Focus on airplane mode and use wifi for everything.