You can also make your own images with the data pre loaded. At one point I was creating/updating/destroying a lot of VMs via Vagrant so to speed things up I made my own images. Then instead of fetching the base precise-64 image and provisioning atop it I could start off with an up to date fully baked VM.

As a bonus you can put them on a local http server and your whole team can download them. Just update the URL in your Vagrantfile.