So,
Luiz Razia (who was beaten to the 2012 GP2 title by Davide Valsecchi) gets a F1 race seat,
Esteban Gutierrez (who finished 3rd) gets a F1 race seat,
Max Chilton (4th) gets a F1 race seat,
Diego Van der Garde (5th) gets a F1 race seat.
David Valsecchi meanwhile has to settle for a 'third driver' position. At least it's with a decent team I suppose. He'll just have to hope that Grosjean gets himself another ban.
On the above evidence, my prediction for Force India's second driver is Jon Lancaster.