I was watching a show on conspiracy theory awhile back, and when one of the speakers referred to Satan as Lucifer I knew he had not done enough biblical research to be worth listening to. The name Lucifer comes from a misunderstanding of Isaiah 14:12:
Quote:

KJV:
How art thou fallen from heaven,
O Lucifer, son of the morning!
how art thou cut down to the ground,
which didst weaken the nations!

Quote:

NIV:
How you have fallen from heaven,
O morning star, son of the dawn!
You have been cast down to the earth,
you who once laid low the nations!


The Hebrew Bible refers to Heylel Ben-Shachar (yes, I know technically there were no vowels), which means something along the lines of “morning star son of the morning.” Heylel Ben-Shachar is translated to Lucifer (Roman name for the planet Venus, and one of their Gods) by Jerome for the Vulgate and by extension the JKV of the Bible. If one reads Isaiah 14 in it's entirety it appears to be referring to the king of Babylon (my understanding is Tiglath-Pileser III) who was hauty and prideful but was laid low by God. He is even referred to as a man in verse 16:
Quote:

KJV:
They that see thee shall narrowly look upon thee, and consider thee, saying, Is this the man that made the earth to tremble, that did shake kingdoms;

So Lucifer is not the same as Satan. Don't believe everything you read in a book by John Milton. Smile Attached are some more references that might clear things up.

Some references:
http://en.wikipedia.org/wiki/Lucifer
http://www.everything2.com/
http://www.kjvonly.org/doug/notes_on_lucifer.htm