After a couple of cast on's, the pillow cover had begun!
One lesson learned, double knit is much wider. I thought I needed 80 stiches to make 20", so I cast on 80 of each color, or 160 total. This was ridiculously too big.
Now I have 80 total, or 40 each of gray for the front and yellow for the back.
I also learned that I really and truely have to follow each step on the edges if I want them to come out uniform and seamed. There's a great youtube video on making edges
http://www.youtube.com/watch?v=0-BLtYkAfa8&noredirect=1
If that link doesn't work, it's called 'No slip, slip stich edging for double knitting'.
It's kind of slow, so at first I was all like, I bet I can cut some corners here. But I found out I really can't. If done, just as shown, it works beautifully though.
I joined in the third color for the letter A, blue, last night. I did it part way through the row, just a couple of stiches from where I was going to start needing it. I did this out of sheer laziness thinking it was that many less stiches to have to carry a third strand, but it wasn't the best idea because now I have a blue tail in the middle of the piece that I'll have to deal with later. I think it would be best to join in on the edge, but then again I would still have a blue tail either way, so maybe it will turn out brilliant.
The pattern was also adjusted so that the letter A starts on an odd row. This is the 'front' as you follow a double knit chart and so it made so much more sense to just cross a row out and start one sooner than I had charted the A.