Should be very simple to refuel but not that many stations selling NG yet. I think we'll see truck stops selling NG before regular stations do. I haven't seen NG vehichles with any sort of interchangable tanks. The NG tank is securly mounted in the vehicle. Has to be for safety. Some of the negatives with the NG vehicles that I have read about are less horsepower, more frequent refueling, and some evaperation in very hot weather. The NG vehicles operate for a lot less money and require less maintainance than gasoline vehicles. Low emissions also.
Smart move by Honda. Refueling adapter at home makes it a non brainer especially if the states pony up with subsidies to help pay for it. I hope Honda takes the engine and puts it in their van too. Be the first to market like Chrysler and the caravan!