Finally got the baby picture on my belly picture. The kids started out on my left side with the boy lower and the girl up higher. Once the got bigger, the girl moved over to the right side and both of them decided that "heads up" is the way to be. And for the last about 3 months nothing has changed. Looks like they like it this way. Which is why we are probably heading in the direction of C-section, as there is less and less room for any kind of movement.
Sometimes I think they're already fighting in there and that the little girl is kicking the little boys ass (as well as mine).