I'm not sure if the House Rules forum is the right place for this question, but I'm pretty sure that sometime within the last couple years I found some good rules for scaling psionic powers, and I thought they were from Monte Cook or Bruce Cordell. Not sure if they were online or in a book. If I remember correctly, they featured spending more power points to get more damage dice. I even remember this neat little chart. I just can't find that chart again.