The cloud-init package can grow partitions in cloud images using parted. Support for it was added in this ubuntu patch
and I believe proposed upstream. It would be nice to have this for Fedora 19.
We have a workaround for resizing partitions with the "cloud-utils" package, but it has significant dependency creep over using a patched parted.
This will be added when/if upstream adds it.
FTR, this is now upstream in parted 3.2 and newer, which will be in F21. I'm going to change the resolution to CLOSED:NEXTRELEASE to reflect this