MacDailyNews points out that the WHOIS records of ‘macbookair.org’ and the ‘.net’ show the following address:

Admin Street1: 303 Second Street
Admin Street2: Suite 800N
Admin City: San Francisco
Admin State/Province: CA

‘macbookair.com’ is currently showing as a private WHOIS record so is not showing any address but ‘macbookair.us’, ‘macbookair.biz’, and ‘macbookair.info’ all show the above address as well as:

Billing Street1: 1 Infinite Loop
Billing Street2: Mail Stop 3-TM
Billing City: Cupertino
Billing State/Province: CA
Domain Registration Date: Fri Jan 11 22:49:59 GMT 2008