Here are, to my knowledge, all of the MAC quads (general release time, quad name, shades in the quad). If you would like to contribute photos/swatches of a particular quad so I can assemble a super complete quad reference guide, email she @automaticjacket.com. This does not include trios or other palettes - only those with four full-size round shadows, yo!

Follow up:

1 * Pure (March 1999) - (White Frost, Shroom, Digit, Brill)
2 * Skinflicks (January 2001) - (Brule*, Camel, Cork, Mystery)
3 * Skinflicks [Asian Ex.] (February 2001) - (Orb, Trax, Patina, Shale)
4 * Perverted Pearl (January 2002) - (Seedy Pearl, Black Pearl, Perverted Pearl, Print)
5 * Denim Dish 1 (June 2002) - (Venus, Bark, Greystone, Smut)
6 * Denim Dish 2 (June 2002) - (Washout, Fade, Denim Dish, Night Owl)
7 * Colour Scheme 1 (February 2003) - (Truce, Mild Orange, Stimulated Copper, Studied Brown)
8 * Colour Scheme 2 (February 2003) - (Quarry, Decorator Pink, Trax, Beauty Marked)
9 * Colour Scheme 3 (February 2003) - (Semi-Tone Greige, Excitable Yellow, Sublimed Green, Shaded Mint)
10 * Brows (July 2003) - (Vanilla, Cork, Coquette, Concrete)
11 * Liza AM (October 2003) - (Performance, Taupe Note, Showstopper, Soft Heart)
12 * Liza PM (October 2003) - (Seedy Pearl, Girlishous, Showstopper, Kicky Blue)
13 * Cool Hypnotique(2003) - (Vanilla, Vex, Digit, Rose)
14 * Chromezone 1 (February 2004) - (Brule, Pickle, Mystery, Gleam)
15 * Chromezone 2 (February 2004) - (Pinkling, Unreally Blue, Nocturnelle, Contrast)
16 * Chromezone 3 (February 2004) - (Sugar White, Pushup Pink, Sub Green, Slated)
17 * Tease Me (August 2004) - (Garçon Gray, Bistro, Parisienne, Seedy Pearl)
18 * Tempt Me (August 2004) - (Girl Meets Boy, Hard To Please, Modelette, Pleasurepurr)
19 * Bada Quad (September 2004) - (Vapour, Rose, Beauty Marked, Soba)
20 * Sweet Tea (December 2004) - (Buttersilk, Sweet Lust, Green Tea, Redcoco)
21 * Diana Eyes 1 (January 2005) - (Vex, Up-Do, Endless Love, Soulsong)
22 * Diana Eyes 2 (January 2005) - (Shroom, Flipside, Dance Mix, Showstopper)
23 * Flutterfly [Asian Ex.] (February 2005) - (Honey Lust, Petalwink, Brill, Tilt)
24 * Beau (April 2005) - (Sugarlily, Hard To Please, Pink Like Paris, Forgery)
25 * S Eyes [Taiwan Ex.] (July 2005) - (Seedy Pearl, Star Violet, Beautiful Iris, Nehru)
26 * Free to Be (September 2005) - (Smut, Crochet, Free To Be, Sensibility)
27 * Inventive Eyes (September 2005) - (White Wheat, Velour, Twillery, Inventive)
28 * Magical Illusions (2004) (Motif, Mythology, Digit, Parfait Amour)
29 * Boudoir Hues (2005): (Silver Charm, Titillate, Lounge wear, Trousseau)
30 * Thunder eyes (2006): (Thunder, Scarab, Rye and Sketch)
31 * Laze Eyes (2006): (Laze, Shale,Vanilla, Kid)
32 * Flowering (2006): (Sunseed, Blossom Cherry, Honesty, early lawn)
33 * Sweetie Cake [Asian Ex.](2006): (Almond Icing, Sugar Blue, Demi Sweet, Gateaux)
34 * Summerwear (2006): (Lightweight Black, Lustreleaf, Julep, Nylon)
35 * Boy Beauty [Asian Ex.] (2006): (Vanilla, Cork, Blu Noir, Omega)
36 * Well Plumed (08/06) ( Courage, espresso, Well-Plumed, Shroom)
37 * Take Wing ( 08/06) (TickleS, Take Wing, Restless, Bravado)
38 * Corps de Couleur (12/06) (Terre a Terre, Footwork, Vapour, Leap)
39 * Amazon eyes (01/07) (Amazon, Statuesque, Roustabout, Primal)
40 * Sultress eyes (01/07) (Sultress, Aria, Fake, Pure energy)
41 * Dollymix Eyes (03/07) (Cuddle, playfull, Warm me Girl, Nearly Night)
42 * Pandamonium eyes (04/07) (Cloudbound, Up at Dawn, Violet Trance, Pandamonium)
43 * Showflower (05/07) ( Leaflette, Faintly Fleur, Prize Bloom, Rare Specimen)
44 * Gentle Fume (08/07) (Rondelle, carbon, Gentle Fume, Waft)
45 * Smoking eyes (08/07) ( Next to Nothing, Smoking, Showstopper, Satin Taupe)
46 * Fafi 1 (02/2008) (Vanilla, Hey Pink, Venus, Howzat)
47 * Fafi 2 (02/2008) ( Bold as gold, shockwave, You're Fresh, Prankster)
48 * Stowaways (05/2008) (Awash, Crest, the Wave, Satin taupe, Sea cadet )
49 * Spiced Chocolate (09/2008) (Nanogold, Brash, Spiced Chocolate, Chestnut)
50 * Tempting Quad (09/2008) ( Next to Nothing, Sharp, Dark Edge, Tempting )
51 * Shadow Lady (09/2008) (Light Fall, Smudge Violet, Deep truth, Shadow Lady)
52 * Too Dolly (02/2009) (Yogurt, Romping, Too Dolly, Stately Black)
53 * Lucky Tom (02/2009) (Creme Royale, Paradisco, Stylin', Lucky Tom)
54 * A Rose is a Rose (05/2009) (Solar White, Seeds of Love, Petal Worship, Contrast)
55 * In The Gallery (08/2009) (Lightfall, Look at the Eyes, In The Gallery, Private Viewing)
56 * Notoriety (08/2009) (Skintone 1, Skintone 2, Notoriety, Rich & Earthy)
57 * Photo Realism (08/2009) (Photo Realism, Fresh Approach, Image Maker, Grey Range)
58 * Tone: Grey (09/2009) (A Warmer White, Tone: Grey, Waft, The Right Smoke)

I have and can swatch: Colour Scheme 3, Thunder Eyes, Sweetie Cake, Take Wing, Amazon Eyes, Pandamonium, Showflower, Gentle Fume, Smoking Eyes, Fafi 1, Fafi 2, Stowaways, Spiced Chocolate, Tempting and Shadowy Lady. Other than that, I need a hand - please feel free to contribute and I'll build this a permanent reference page of its own ASAP.