Erm, it's getting HTTP errors when trying to upload images or a 503. The service with this webhost is awful and we're just going to switch. Thanks bud.
EDIT: Now it's failing to write images to disk. This has been going on for over 12 hours now. It looks like the /tmp directory might be full...
For the past 4 or 5 hours we haven't been able to upload any media files to our site running on Wordpress at all... It just gives HTTP errors among other things.