Kate is not recruited yet
Some people seem to think that Kate is already (at the end of episode 6×06) recruited by E.I. Locke. To me (and probably to most other viewers) it is obvious that Kate is still normal and that she’s just following Claire. Kate came back to the Island to look for Claire and now she thinks she’s found her. Both Locke and Kate look surprised to see each other, but Kate ought to be the more surprised one since she must have thought that Locke is dead.
So Kate is not recruited yet. However, who knows what will happen in the next episodes if and when Kate interacts with Locke, Claire, Sawyer and Jin.