We even see the moon as it was around a second and a half ago.
The New Horizons spacecaft that will fly past pluto in 2015 is currently about 3 hours and 12 and a half light minutes out.
Definitively it makes communication impossible with another world, at least in the present. Any communication would be years in the past once it arrived, and any outgoing communication would be years in the past once it arrived at the source output. Unless one could bend or fold time and space and then the implications say that would be disastrous. Makes us kind of stuck elsewhere than here in the present to find intelligent life because of the time necessary to verify a communication.
These discussions are enlightening, humorous, and joyful to imagine our insignificant selves as being able to discover and communicate with other insignificant beings not of our world.
Thanks cripplecreek, it was worth the time. It (communication) is fun to think about though probably impossible with the limited knowledge of time and space. Perhaps one day and then it will probably be all for naught, for then a certain amount of faith would be necessary for the communique to be trusted as actual.