It should be possible to communicate instantly using quantum effects
where the all-important "observer" is manipulated like a morse code
key.  In the quantum world, observers don't have to be humans, they
can be machines/measuring devices.  If one operated billions of
observing machines, it should be possible to create a collapse of
reality/entropy into a well measured/defined state due to the act of
hyper-observation.

Consider the project by Princeton University using random number
generation machines and their apparent synchronicity during the Sept.
11th event

http://noosphere.princeton.edu/terror.html

if there truly is a correlation between human observers observing
global events (like Sept. 11) resulting in synchronicity of random
generators dependent on quantum physics (and in an observer-dependent
quantum universe this seems to make sense to me), then perhaps at
times when synchronicity events measured by random number generators
are observed but there is no large-scale human-consciousness-focusing
event, perhaps it is because observers/measuring devices elsewhere in
the universe are undergoing a observer/measuring machine consciousness-
focusing event?  Maybe we could use Princeton's  random event
generators ("EGGS") as a sort of ETI 'observer' detector array? (they
noticed that proximity of detectors to the 9-11 event caused those
EGGS to be more synchronized.)  Imagine an array of EGGS (like what
Princeton is using) all around the globe.  Perhaps you could work out
the direction of the civilization by based on which were the most
strongly synchronized?   Perhaps George Lucas isn't far from the truth
(I sense a disturbance in the force!)  In the quantum universe,
perhaps the Sept. 11 event caused so many observers to focus on that
one event limited the possibilities of randomness, causing reality to
'collapse' into a more defined state (So in analogy, if one considers
the Shroedinger's cat problem, if Shroedinger's cat is dead, and it is
observed as being dead by billions of observers, not only are the
cat's space/time coordinates and his state of 'dead' well-defined, but
the states of all other quantum-affected random systems near the cat
and the observers are also well-defined because the observers are
hyper-observing the cat's state, leaving much less random-state
options for reality over a span of time.)

If ET (or we) can create arrays of billions of measuring devices
(which equals "observers") to observe specific events in a coordinated
way, we could make them fire in an on/off way that could be used for
instant messages.  For example, machines measure event = 01, machines
do not measure event = 00.  If ET (or we) use a random number
generator to measure the synchronicity caused by the machine/observer
measurements of events. one could send a binary code that would be
detected instantly anywhere in the universe.  You could communicate
anything instantly!