Hi there,
Actually, the best permanent address for inquiries is: ark_support@intel.com
In addition, you can always use the "Send Feedback" button on any ARK page.
And just a heads up: We will soon be releasing an online application process for an OData API key. When that online tool is available, likely by October or November of 2012, you'll be able to access it from the ARK OData page at: http://odata.intel.com/
Brian