Free Companion Flights with T-Mobile Contract

If you sign up with T-Mobile on a 2-year agreement by 12/24, T-Mobile will give you a companion flight ticket per line.  The ticket is valid until 2/15/2010 with no blackout dates.  You can get up to 5 free companion tickets per account.  Both new and existing customers qualify for this offer.  You can find additional details here.