public_call is a secret santa fic exchange for Doctor Who and its various related fandoms, run through LJ and AO3.
Sign-ups: 3rd - 16th October (request 3 to 15 relationships, offer 3 to 20. One each must be New Who and/or Torchwood.)
Deadline: 20th November
Posting period: starting 1st December
Sign-ups are open now.
More info: Detailed Rules and FAQ