Thanks to a software upgrade on the site, the easiest way to post your photos is like so:
After writing the text, scroll below to the tab that says Upload Attachment.
Upload any size photo from your files. (Browse, then Add the File)
Click on the button to Place Inline.
Then hit Preview, and if you like what you see...Submit!
That's all there is to it, and this will create a smaller photo for all to see, and then they can click on that to see the larger version of your spectacular photo.
- Janna :)