I think it is a great idea to have a plus sized belly thread!!! I feel self-conscious posting in the other one with all those perfect little bellies.
I worked in a plus sized store for a couple of years - at least once a week I would have some coming in looking for maternity clothes. It was SO frustrating 'cause not only could I not show them anything I couldn't even send them somewhere else. There are less choices in Canada than there are in the States from my understanding. I have found dresses & skirts or yoga pants with the large band you're supposed to fold over work quite well. I did manage to get a couple maternity dresses from Old Navy recently (I am smaller this time than I was with ds) & I must admit having them cut a little longer in the front is nice, especially as I'm tall & short dresses tend to be really short on me.