OK...this looks like my perfect solution = DropBox + DropSync.
I am only using one folder because I have the free version but I'll buy the app and set up the rest tonight.
If I create every folder I have on my phone in Dropbox, I can use DropSync to sync them all individually. Any changes made to that folder will be made to the DropBox folder as well. This includes adding new pictures, deleting pictures, even renaming them. The only downside is remembering to set up new folders I create and setting up the link with DropSync.
This is great!
Now I just need more DropBox space. If anyone wants to try it, give me your email address and I'll invite you. We'll both get bonus space that way. Send me a PM if interested.