Thanks for this post! I just got back to my first sock (had to take a short break for baby shower items) and got to this point myself last night. I had finished the heel and was joining back in the round to do the rest of the sock (I am knitting on 2 circs, toe up) and TOTALLY have a huge hole on one side

I figured I would just kinda stitch it up.
Chris, thanks for posting that link. It seems a little confusing to me right now, but I'll give it a shot when I work on the second sock - it will probably make more sense if I actually "do it" while knitting than trying to read about it here at work!