Mobile vet Robert Tercek joins OWN: The Oprah Winfrey Network as president of digital media. Tercek was CMO of mobile gaming firm MForma back in the day and before that was SVP-digital media at Sony Pictures Entertainment. Just prior to the OWN position, he was the co-founder of health and wellness lifestyle social network Peoplejam

At OWN, the multi-platform media JV between Discovery (NSDQ: DISAB) and Oprah’s Harpo’s Productions, Tercek will lead digital efforts for OWN and Oprah.com. One highlighted mission: build a “significant” social networking presence. Tercek starts at OWN Nov. 3; he’ll be based in LA with an office in Chicago, where Oprah and Harpo are based. OWN’s debut is slated for 2009, when it takes over the Discovery Health Channel. Release.