My eyeshadow collection as of May. The majority of my eyeshadows are palettes or have been depotted into palettes, so thats mostly what you'll see here.
Almost all my eyeshadows:

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Lets divide them up into Japanese brand palettes:

and western brand palettes:

I am actually missing 3 palettes from this post - the So Smurfy palette, and 2 Hello Kitty eyeshadow palettes. But doesn't matter, if you're into makeup (and you probably are to be reading this) you probably know how those 3 look like anyway.
First the minority - the eyeshadow singles I have:

RMK Shiny Mix Eyes in Green
Majolica Majorca eyeshadow - an olive-y light green
MAC Aquavert (in special packaging from the Lure collection)
MAC Silverthorn (Rose Romance collection)
MAC Cosmic (Moonbathe collection)

ELF, NYX, Annabelle depotted / pan form eyeshadows
Drugstore palettes - US:

ELF quads - various
Almay Play up the Brown palette
Maybelline Limited Edition Amber Adventure quad (if I recall the name correctly)
Maybelline Seashore Frosts quad (I keep this around despite crappy payoff because it was one of my first eyeshadows ever)
Drugstore palettes - Japanese:
Lavshuca Eye Select palettes
Majolica Majorca Trick On LE palette
Majolica Majorca palette (might sell this)
Kate Line Spicy palette (which I sold recently)

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Mid-range brands - US:Also not pictured up close but in the overall pic is the Best of Becca palette, Nars Jolie Poupee duo, a Lancome GWP quad, Gosh quad, and Coastal Scents 88 shimmer palette.
Stila
Blanc and Noire palettes - picked these up mostly because of the design
Precious Pearl palette LE Spring 2009
Lorac

Greatest Hits CD palette (my first Sephora purchase!)
Showstopper palette (LE)
Pink Python palette (LE), bottom left
Snake Charmer palette (LE), bottom right

MAC

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Eyeshadows depotted / pro pans
Pandamonium quad (Balloonacy collection)
Holiday '06 Intense Eyes palette
Holiday '07 Cool Eyes palette
Mid-range to higher end brands - Japanese: 
Lunasol Sheer Contrast Eyes - purple
Lunasol Lighting for Eyes - pink/brown
T'estimo Frame Impact Eyes in Green, Purple
T'estimo Grande Shine Eyes in Pink/Grey
Coffret d'Or 3D Lighting eyes in Blue-green
Sofina Aube Jewelry Shower Eyes in purple
Maquillage Clean Contrast Eyes in silver

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If you compare this to my
previous collection post over a year ago my eyeshadow collection has changed a bit - I used to have 3 palettes worth of eyeshadow pans, but I got rid of most of them and starting collecting more palettes instead. Also this post only covers powder shadows, not including the Shiseido Hydro-powder shadows and Benefit cream shadows that I have. I should try to sell some but its hard to part with them though.