Mitten instructions: http://www.kategilbert.com/ms_gifted.html
Now that I am clear on the 3 needle bind off, I've started a new pair and came across a question on the thumb. Basically, you fold the thumb in half and crochet it closed and then reinsert the loop remaining from crocheting back on the knitting needle to continue. The pattern doesn't specify, but I'm thinking I should treat this as a seam (as with the 3 needle bind off) and put right sides together, and then, eventually, turn the thumb right side out.
On my first pair, the crocheted (sp?) seam is visible, and a little chunky. This simple, little pattern is showing me that I know nothing about finishing techniques!!