Well, I have an OC whose only power is to know what people need.  Not want, not like, but /need/.  This can vary from a super high-tech whatcha-ma-doohickey to a listening ear to a punch in the face.  And everything has a time limit, which makes it harder, heh heh heh.

As for ideas, sometimes just throwing people together in a crazy situation and saying, "figure it out, bye!" is as good a plot as any.  Things will develop from there.