I know you probably already knew this, but I just discovered it and it works so well I wanted to pass it on. I installed Dropbox on my iPhone. Dropbox (in its current incarnation) more or less assumes that you are doing this to handle photographs. You have the option of forcing Dropbox to only use wifi to transfer photos from your phone to your Dropbox account (recommended) and you have the option of background transfers (I think that is also a good idea). The photographs are given file names that start with the year, then the month, then the day, etc. which is exactly what you want. They will be placed in a folder Dropbox will make called “Camera Uploads” (though that name may be something you can set somewhere, I’m not sure). After the photos are uploaded you can delete them from your iPhone.