Thanks for the feedback and compliment.
Right now the pictures are showing the most recent uploads to the gallery.
To get your pictures on the homepage, all you have to do it
upload them, then presto, they'll automatically show up on the left. When someone else uploads a photo, yours moves one space to the right, till it gets bumped off.
I'm thinking about doing another area that pulls random photos, so older photos have a chance to be included in the rotation.