Kearnunos - Yup, that's me. And thanks.
The alien's intelligence is highly debatable, and this is what I was getting at in my unused comments in the featurette. Did the aliens cut the power to Ops? Possibly, but then the power could have been damaged as they moved through the sub flooring or above the drop ceiling. Yet, they seem to have picked up on the fact that humans are easier prey in the dark - hence Newt's comment about the fact that they mostly come at night. Why would a creature with no eyes and no need for light hunt at night? They would only do that if they figured out that humans are dormant when there is a decline in power (i.e. - sleeping). I should mention here that I also believe that the aliens detect bio-electric output and use this (much like sharks) along with other senses such as olfactory, thermal, auditory, and vibratory. This would mean that they could also detect low level electromagnetic fields from other sources, such as electronics - thereby allowing them to notice a correlation between human activity and power levels. ...Back to my point: Humans are also slower, panicky, and they ability to fight back is diminished when there is a limited power (i.e. - no lights). They also don't venture out of the colony as frequently at certain times. The aliens were in the colony for a month when the Marines arrived. After a few days or a week they could have easily noticed patterns in human activity.
There's also 12 Module on the Nostromo. Parker swore that they fixed it, yet it was malfunctioning... and this shortly before Brett was attacked.
Another topic of discussion regarding alien intelligence... how did Jones get in a closed locker right outside the bay were the alien was?
How did the alien know that Ripley was going to the Narcissus? With an entire ship to crawl around in how did it know that was the one place that she would go, and be the one place that would be safe?
On Fiorina the alien seemed to know that getting in front of the piston was a bad idea, and it didn't do it until Ripley (or more correctly - the queen) appeared to be in danger.
On the Auriga the alien that confronted the crew of the Betty after killing Elgyn put itself between the humans and the hull of the ship, it seemed to know that it was safe by doing this and that the humans were cornered without defense...
Speaking of Elgyn - he was lead a way from the others by a trail of weapons. Seems to be an interesting choice of technology to be used as bait for a trap. It would indicate that the alien had some understanding that those items were of some value to the humans.
Each of these could be argued as high degree of intelligence, but they could also be argued as pure coincidence given the circumstances of each situation. It's difficult to say that the aliens are highly intelligent... but, by the same token I think there is too much going in their favor to say they are dumb.
...I could go on...
