YazidisThe Yazidis worship 'the angel who didn't bow down to Adam', represented by a peacock. They pray three times a day, towards the sun (haram), at the times when it's forbidden to pray: sunrise, zenith, and sunset. There's a hadith that forbids praying at sunrise, muhammad (saw) says something about it being between the horns of shaytan. They believe in God, the creator of the universe, but that God put Malak Ta'us (their name for Iblees, meaning 'Peacock Angel') in charge of the world.
(They also claim to not be descended from Adam and Eve like the rest of us humans, only from Adam's sperm in a pot turned into a man who married a houri
http://en.wikipedia.org/wiki/Yazidi#The_Belief)
Iblis in SufismSee also
Kitabi Tawasin of Mansur al-Hallaj, Summary of relevant chapter 'Tasin of Before Endless Time and Equivocation':
? There was no worshipper or monotheist in Heavens like Iblis. He didn?t
consider Adam or Man worthy of prostration, as God alone commanded the
right to worship. His staunch belief in God?s majesty, pure and exclusive,
stopped him from obeying God?s command to bow before Adam.
? Iblis considered both God and himself to predate the creation of Man, and the
progenitor cannot worship the successor.
? Iblis preferred being distanced from God and dethroned from his supreme
spiritual ranks than to worship anyone else than God. For him, desertion from
God meant His companionship, a distance that brings him nearer to
appreciating God?s uniqueness: ?there is no one capable of being worshipped
other than God.?
? Dialogue between Moses (AS) and Iblis Iblis met Moses (AS) on Mount Sinai
and what ensued was an interchange of questions and rejoinders. Moses claims
that Iblis had sinned by refusing the Command of God. Iblis retorts that it
wasn?t a command, rather a test, which he faired well. Moses, on the other
hand, as Iblis argues, was unsure and wavering in his faith when he asked for a
manifest show of Divine effulgence before his eyes. The levels of trust of Iblis
and Moses can now be very easily compared!
? Iblis claims that although he is a wretched, disfigured creature, yet his outward
misery does not reflect his inner purity and firm belief in the Unique Unity of
God.
? Iblis is still a firm believer in God and worships God as He Is.
? Iblis?s refusal to find partners with god speaks of his pristine love for the
Creator. He prefers burning in hellfire than making equals to Him.
? Azazyl is the name of Iblis before his downfall.
? Azazyl preached good deeds to the dwellers of Heaven and evil deeds to the
dwellers on earth. He had to teach vice so that virtue could become
recognizable.
? Dialogue between Iblis, Pharaoh and Hallaj Iblis was proud as he couldn?t
find anyone comparable with himself in piety and virtue. Pharaoh didn?t
believe in Moses (AS) and declared himself to be of the highest rank, because
he assumed his people had lost the capacity to distinguish between truth and
falsehood. Hallaj then goes on to claim that he is a sign (tajalli) of God?s
presence.
? Iblis, Pharaoh and Halaj ultimately share similar destinies. Iblis was threatened
of fire but he didn?t take back his declaration and was subject to humiliation.
Pharaoh continued his denial of Truth and was drowned to death. Hallaj will
also be crucified, but he will not step down from his proclamation.
? Iblis is a martyr who became a means to God?s writ being executed.
? Iblis?s plight is confusing, because despite his unmatched Unitarianism, he fell
victim to the evil of conceit: ?I am made of fire and Adam is made only of
clay?.
eta: My best guess at the etymology of the name Iblees is from the Greek 'Diabolos'.