+1 on this one. I run small SMP server with one way teleporter (i don't have power plant on the other side yet). Teleporter distance is roughly 700 blocks. The thing is that after some time (usually after disconnect or server restart) even powered side of the teleporter stops workng. I have MFSU unit with 10 million EU under it so it is not matter of power. I have to manually reset teleporter link with freq trans every time...
I haven't tested it much due to the distance between the teleporters. 