@Nihilanth,
I often think of the same three, though for the free energy I think of an energy source such as ZPE, abundant and available anywhere provided we can tap it. Imagine turning hydrogen into lettuce at will. Or perhaps if we can tap ZPE then we can create the matter out of energy and skip the transmutation. And with control of ZPE we may get control of gravity or space and then we're off.

Let's see... one "provided we can", one "if", and one "we may".  :-)
-Steve
http://rimstar.org

@b0rg13: Even if people create their own local economies, everything can easily be changed back. The only good economy is no economy.

My approach involving the creation of a process of transmutation and object replication (possibly at atomic level) would render all currencies un-backable and unnecessary. If you could put a food item, like a sandwich into the atomic replicator, and it deconstructs is, creating a form of "blueprint" of the sandwich that could be saved as a computer file and shared with others, so long as someone has a replicator and a pile of dirt(transmutation) then they too could have one at no cost. And who's to say one can't replicate another replicator, and just hand them out for free. Once you had one and saw what you could possibly do with it, I doubt you'd ever go to work again to say the least. And if you made at least one other replicator a day and gave them away for free to people asking them to do the same, then I doubt anyone could ever get rid of them all.

I think that this approach is the best possible way to fix the world as it is now. Viral Freedom.

and if people started to replicate themselfs? that would be wierd  u couldmake a blueprint of yourself now and replicate it 20 years later but with reprogramed brain blueprint.Sure i woulndn't want anyone to steal my blueprint 
I agree that money system should be finished as fast as possible and all work should be done by the technology,freeing our capacity to foucus on what really matters in life.First step would be to become self sustained in food,energy and communication chanels.

The beginning versions of the device would probably resemble Reprap or Fab lab. Only once objects can be assembled at an atomic level, and at the same integrity as the original could objects possibly be disassembled to create a usable blueprint. I doubt anyone would survive being ripped apart atom-by-atom. But only time would tell.

Although I wouldn't rule out the possibility of use for donor organs.

I recently read a sci-fi book called "A for Anything" by Damon Knight which started out where someone had created just such a replication device and mailed two each to a bunch of people. Each person was mailed two for the reason Nihilanth gave, so they could replicate the replicator. Later in the story they'd figured out how to stop the replication in mid process and store the pattern for later retrieval. They replicated people too. All things you guys have pointed out. But who does the work? The cleaning, the replicating, setting the table (the contents of which would be trashed afterwards), ... In the book, a period of turmoil was gone through ending up in the replicators being controlled by a minority and the rest of the people being slaves. I was saddened by this since near the beginning of the book some were talking about replicating rocket fuel on the fly so that rocket travel to and in space would be a cinch; carry just a little bit of fuel which you repleatedly replicate and shoot into the combustion chamber. Unfortunately the author didn't go that way. So we really need only the replicator! The free energy comes from that. I'm betting we'll be tapping ZPE before we can figure out replicators - though both would come from a better understanding of reality.
-Steve
http://rimstar.org