I learned how to post images within my new posts and replies, so I wanted to share. It's not the greatest way, but it's something.
If you have an online photo album that is public, you just have to get the link of the image you want to post. I have a flickr account but you can use facebook, or any other site that you store images.
Once you have the link to your photo, click the last icon in the new editor tool bar. It looks like a photo frame icon (it's next to the unlink icon).
Put in the link to your photo, and click OK. The picture should show up. Here's an example of a recent ultrasound. I hope this helps.