I'm getting ready to release some PHP example code for the REST API, and I think I'm close but I'm hitting a problem. I've made it through the OAuth dance, but I'm receiving this error response when I actually try to make an API call:

[{"message":"The REST API is currently in pilot, and is not enabled for your organization.","errorCode":"API_DISABLED_FOR_ORG"}]

From the previous thread I understand that this is a separate permission from the main API one that's enabled by default for Developer Edition accounts. How can I turn that permission on?

Here's the code as it stands:

http://github.com/petewarden/salesforce_restphp_example/blob/master/index.php

And here's a live demo:

https://www.openheatmap.com/labs/salesforce_restphp_example/index.php