Some definitions

"The meaning of a word is in its use"

artificial (from answer.com)
ar·ti·fi·cial
adj.

1. 1. Made by humans; produced rather than natural.
   2. Brought about or caused by sociopolitical or other human-generated forces or influences: set up artificial barriers against women and minorities; an artificial economic boom.
2. Made in imitation of something natural; simulated: artificial teeth.
3. Not genuine or natural: an artificial smile.

[Middle English, from Old French, from Latin artificiālis, belonging to art, from artificium, craftsmanship. See artifice.]

I use artificial in the sense of 'not natural' rather than specifically 'made by humans'. And by natural in this context, I generally mean 'emergent' - if i describe something as natural, you can think of it as something which has come about through the automatic functioning of a system, even if the basic system itself was very much artificial (see Emergence)

intelligence (from answers.com)
in·tel·li·gence
n.

1. 1. The capacity to acquire and apply knowledge.
   2. The faculty of thought and reason.
   3. Superior powers of mind. See synonyms at mind.
2. An intelligent, incorporeal being, especially an angel.
3. Information; news. See synonyms at news.
4. 1. Secret information, especially about an actual or potential enemy.
   2. An agency, staff, or office employed in gathering such information.
   3. Espionage agents, organizations, and activities considered as a group: “Intelligence is nothing if not an institutionalized black market in perishable commodities” (John le Carré).

For me, the key element here is the faculty of thought and reason. The capacity to acquire and apply knowledge is all well and good, but, leaving aside the need to define knowledge, it does not cover everything I think is generally meant by the word 'intelligence'. I believe most people would consider someone who can merely acquire and apply knowledge to be quite unintelligent in comparison to someone who can acquire knowledge, abstract it into rules for general problem solving, and apply it not only to the domain from which it was learned but to novel domains, also.

Making that leap between domains is, for me, a major part in intelligence. It is linked to creativity, but does not necessarily imply an artistic nature.

Tune in later for more definitions, and a stab at the meaning of 'consciousness'