As far as the the trucks thing goes, whoa horrible idea. You don't get people to side with your cause by pissing them all off. However the time is right to do something big and really try to make a change but it will have to be extremely well thought out and all the details of what you're trying to sell to the public (what will it mean money, energy, security, environment, etc wise.) Those all need to be well thought out and all added up and then a short proposal written up explaining it all and asking people to rally to our cause all at the same time across the country. Non violent, not intentionally disruptive, clever, and most importantly as you said NEWS WORTHY and impossible to ignore.
People around the country now know change is possible and 10 million are already out of work. That's a lot of people with a lot of free time, with many more to come we hear. So I think it should be no problem getting massive numbers of people to actually show up to something.
Whether it can actually succeed now to create the full about face we seek is questionable at best no matter what, it has to be really brilliant, but I'd be willing to chip in any amount of work and planning to make something happen.
It would need to be done in conjunction with every other site like this and preferrably include NORML, and any other organization willing to sign on in support. Black rights organizations, civil rights, disabilities groups, you name it every single thread of support all at once putting their foot down.
Probably something that would take months to put together and be best suited for summer. Hempfest gone postal.