An ITIN is, as I recently noted, an identification number issued for tax purposes when the applicant is not eligible for a Social Security Number.

FORBES: As SCOTUS Rules On Arizona, IRS Struggles With Tax And Immigration Related Measures

Reports suggest the number of tickets per buyer will be limited, and that once an applicant is successful they will not be allowed to purchase any more.

BBC: London 2012: Olympic ticket ballot to be prioritised

Due to the expected number of submissions, we won't be able to reply to every applicant.

UNESCO: Science writing internship opportunity at EU UniverseAwareness (Deadline: 8 August 2012) | United Nations Educational, Scientific and Cultural Organization