I'm going to begin a one month trial of using my iPhone's 3G connection as my sole source of internet access. In Canada, as you may now, iPhone is allowed to tether for free, as long as you're within your monthly cap. For original iPhone subscribers, that means that with the iPhone launch promotional plan, you get 6GB. My typical monthly usage has always fallen under 1GB using iPhone tethering almost every day at coffee shops. I expect that to go up but I don't think it'll multiply by six. I'm not going to alter my internet habits. If this works out, I'll be getting an iPad 2 for internet use and my MacBook Pro as my work machine, with tethered access. I'll blog my experience here. Stay tuned.