Furthermore, it turns out that if A is entangled with B, and B becomes subsequently entangled with C, then A and C are now also entangled. This is known as entanglement swapping. You can read more about it at the wikipedia article on Quantum teleportation.
The principle behind teleportation works off these same principles: it is possible, theoretically, to prompt changes amongst entangled objects, so that it appears as though information or an object has "travelled" from one place to another. But nothing travelled anywhere. It is the relationship amongst the entangled objects that causes manipulations at A to result in predictable changes in B and C.