Great observations Centaur and Lunakasha with the wings! I think the artichoke looking things at the top of the wings are actually part of the wings themselves. When you look closely at a birds wing they often have a cluster of smaller feathers at the "elbow" connection.
You have inspired me to look up the meaning of the wings and also the 666 / I, after reading through this thread.
From "The Crowley Tarot - Handbook to the cards":
On the card we see in the center of moving spheres - a system of whirling wings and disks - a golden coin, the inside of which is inscribed with secretive signs. The innermost center of the coil is formed by three rings symbolising the law of life, whereby it is only through the union of opposites (1 + 2) that new life (3) is created. In this we find the "I" as the symbol of being at one with oneself, the unity, the world of archetypes, the world of soul, the highest wisdom, or the source of all life (Ace). There is also the enigmatic and unfathomable "666", termed the stigma of the Devil by many, which Crowley himself considers to be the "number of dazzlement" . . .
The Greek inscription TO META OHPION (To Mega Therion) means "The Great Beast" and was one of the many titles Crowley liked to use.
It is amazing how much detail there is actually in the image, all those fine lines of the feathers. Every time I look at the Thoth images I think of how much patience and time Lady Harris must have spent drawing them.
I am not an expert on Crowley either, so can't comment on the weirdo, sexnut thing either so someone else might light to jump in on that one! LOL
I have read some interesting stuff on Thelema from some of the threads here though which does explain a little bit about his beliefs.
CreativeFire