I got a wifi iPad a bit ago and I think iPad is enough computer to take with me on the road for light web surfing, etc. So I was thinking about replacing it with a 3G model to make it truly road-worthy.
Thing is, I don't want the extra fee every month when I'm not on the road. So, what's the deal with how often you can activate/deactivate the data service? If I'm going to be gone for a weekend can I do just the weekend? Can I pay for just a week or a month? Is there an activation fee for when you start the plan?