[StructuralNet]

Thats what I have been trying to do, but I don't see everything matching up:

* Set the Callback URL to your vBulletin url (example: http://www.siteurl.com/forum/)
* Go to the Canvas tab and set the Canvas Page URL (to whatever you want)
* Set the Render Method to IFrame under the Canvas Settings
* Click on the Connect tab and set the Base Domain to your domain (siteurl.com) without the http or www.

When I look through the Developer settings, I don't see a dedicated "callback URL", I see all these different tabs with Callback urls but for such items as the authorize callbacks, canvas callback, etc...