Hey there Richard. You're correct, I've kept posting on kingglutenfree.wordpress.com until the transfer of the domain name is all complete.
I actually wrote back to you on a page I found here, http://richardarchambault.ca/contact/ thinking that we could figure things out through email and ended up getting a reply from another helpful WordPress Engineer.
I'm partially sorted out. I looked at the instructions for just pointing the URL at my other subdomain but GoDaddy's page didn't quite match the instructions so I'm going to try and transfer the domain instead. Then I'll be able to point it at the new blog.
Thanks. You've both been helpful. I've used a few other web platforms and I'm pretty happy and impressed with WordPress so far.