Edit While sitting outside having a cigarette and concentrating on trying to move a stone I realized that although described possible mechanisms for Telepathy I hadn't really explained PK very much at all. So I'll just elucidate a little on that. The only real way that something could be moved remotely would be to manipulate/negate the forces keeping it where it is. These are friction, gravity, momentum and to a very small extent brownian motion of the air around it and any temporary ghost subatomic particles that pop out of nowhere and disappear just as suddenly. However whatever way of doing this is found will still have to abide by the laws of thermodynamics in that the energy required to move a stone by your mind would have to be equal to the energy required to move it up by hand. So lets explore the possible method of moving a stone. To overcome the friction we have to lift the stone and to lift the stone we have to reverse the gravitational field upon it. At the moment there is only one theoretical way of altering gravity and that is using something called the "London Moment" found in rotating mass (also known as "Frame Dragging"). Did you know you're slightly lighter at the north pole than the south because the earth is a rotating mass? It's been known about for a while because it subtly affects some satellites (or is it the south?). Therefore For PK to work the mind has to find some way of convincing the stone that there is an extremely rapidly rotating mass above it. How the mind does that I really couldn't speculate upon as we don't know enough about gravity and whether any kind of field could influence it. Quantum entanglement altering the M or P-Brane substrate seems as good a guess as any. However this might take some energy from the mind/body to do. Possibly causing localized heating etc... etc... Basically the possibility of trying to move something too large might cause brain damage. Interesting eh? One other thing I didn't cover is Teleportation. Actually that may be even simpler. Subatomic particles do it all the time. Some of the diodes in your mobile phone wouldn't even work without the "Quantum Tunneling" principle. It also involves concepts like the "Heisenberg Uncertaincy" principle where the possibility of a particle being in one state and place doesn't rule out the possibility of it being elsewhere (as long as it doesn't violate the "Pauli Exclusion" principle). Such as an electron magically appearing the other side of the insulating junction of a Tunnel Diode. As an aside there already experiments underway to test the human minds ability to affect "Quantum Tunnelling" in such diodes with some interesting anecdotal results over the past 17 years. Basically the theory that the human mind can affect the probability that a particle is somewhere other than expected is well established.
I'll leave you with these thoughts while I actually get back to doing some work now.