If I remember correctly, he signed for two years with Yamaha at the end of his WSBK year (so for 2010 & 2011), with 2010 planned for WSBK, and 2011 assumed to be in GP.
Things got shuffled around and he was moved up to GP 1 year earlier than planned.
So I would guess he is still under a two year yamaha contract (2010-2011), and having done his mandatory "satellite team for rookies" year at tech-3, I would expect him to ride the factory bike next year if Rossi or Lorenzo leave.