
Christine Smith wrote a book and has self published. It's available here. The first 15 pages are available for a free preview.
Here's a quick screenshot of her table of contents.
Answers to frequently asked questions for circular sock machines can be found here. This blog will also serve as a place for me to keep track information available on-line.

From eirual :
Webs - also sells cones of sock yarn, they are not nearly as nice and squishy as Wool2Dye4’s but - they are less expensive. $15 a lb plus shipping (if you order 4 lbs it’s $12 a lb). I find that the color is more cream, the spin is a bit loose.
Bartlett Yarns - lovely cones of sport weight yarn. I find that you really want to use a bit of woolly nylon with this to give the sock a little body. Very easy to knit, I use it to make socks on my 72 needle cylinder with no problems.
Sylvia’s Threads - Best price I have found for woolly nylon.
From sarahspins:
Lion Brand - 100% wool
I should add that one of my current favorite CSM yarns is Treadsoft from Henry’s Attic. The easiest way to buy it retail is likely from Catnip Yarns (just email them - very nice company and super easy to work with). Treadsoft is a smooth 2-ply superwash with a tight twist, it’s not only easy to knit with (it’s a 2/8 yarn, unlike most of the 2-ply sock yarns that are 2/6 and IMO a little on the heavy side), but it wears very well too.
If you have any more sources, please contact me so I can add it to this list.
From Yellow River Station website:
This CD contains information about Circular Sock Machines. How to clean them, how to set them up, thread them, adjust them for knitting including adjusting tension for yarn and conditions, adjusting timeing, knitting waste yarn, placing the ribber and ribber adjustments are all shown in the first section of the CD.
The second section of the CD shows how to make sock tops of different styles: ribbed, hemmed, rolled, picot, and mock ribber tops are all explained and illustrated. Different types of heels and how to make them are shown. Knitting toes both wide and narrow, fashion or wedge and toe closing using Kitcheners or latching completes this section.
Fancy stitches including open work, polka dots and argyles fill the third section of the CD.
Information about various machines and machine pictures provide a short history of the Circular Sock Machine for the fourth and final section of the CD.Initial set--2 tapes, 2 hours each, $45 plus $6 shipping (includes written patterns)--
Contents: checking out parts, cleaning, sorting and testing needles, substituting parts, assembling, threading, using the set-up basket, making a knitted set-up/bonnet, re-hung selvedge on 54 slot cylinder, selvedge on other cylinders, sock with plain foot, sock with ribbed arch, kitchener stitch done from needles. Shows Gearhart, LeGare and Auto Knitter threadings. (Can be used with any brand of machine with exception of the ribbed arch sock section which cannot be done as described using a Gearhart due to absence of drive pin to take ribber out of work.)
Tape #3--over 1 1/2 hours, $25 plus $6 shipping (includes written patterns)--
Contents: mock ribbed sock, kitchener stitch variation when mock ribbing is used, hem-tops, pouches, tote-sampler-stool, embellishments/pockets/elbow patches, changing colors, reversible/double-layered sock; all items can be completed without using the ribber attachment. (Can be used with any brand of machine and any number of slots in the cylinder. Demonstrations on Gearhart, LeGare, Auto Knitter.)
Tape #4--approx 1 1/2 hours, $26 plus $6 shipping (includes written patterns)
Contents: mittens, gloves, special neck warmer; includes section on open fingers and inserting eyelet lace. All knitting is done on machine; finishing requires sewing one side of each finger and thumb. (Can be used with any brand of machine. Demonstration on 60 slot Auto Knitter.)
Tape #5--approx 1 1/4 hours, $21 plus $6 shipping (includes written patterns)
Contents: uses large-eye needles; mock rib sock with selvedge top, fast bootie for kids, sewing up toes from scrap yarn. (Can be used with any machine and regular needles using regular yarns. This video features use of four-ply worsted weight acrylic and heavy wool yarns. Demonstration on 60 slot auto knitter.)
Tape #6--approx 2 hours, $26 plus $6 shipping (includes written patterns)
Contents: knitting diamond patterns in contrasting colors, framing a diamond, putting the contrasting color across diamonds in argyle, finishing hints. (Demonstration on 60 slot auto knitter. Need to adapt pattern slightly for using other cylinders.)
Tape #7--about 1.5 hrs, $21 plus $6 shipping (includes written patterns)
Contents: knitting a sock in ten minutes by using mock ribbing technique and straight-up leg; rehung selvege (no bulky hem-top), exaggerating selvege row, heels/toes using end of row back to work, adding stripes and contrasting heels/toes, replacing needles for foot section. (Demonstration on 60 slot Auto Knitter; can use any working machine; no ribber or special tools needed.) Has a section featuring slotted yarn carrier; wool suggested for this pattern, but experimentation may prove it suitable in synthetics. Hints for speeding up the color changes are helpful in other patterns too.