I've probably mentioned it berfore, but I really like the idea of wind-propelled, walking robots. Sort of Solarollers with a timber-and-heavy-iron feel. They would walk slowly, but really, how much of a hurry wopuld you be if you were living inside one? At ten kilometers a day, it would take ten months to cross the continent...
And of course, the lances would come in handy for jousting , for jockeying into the best windstreams...
