Jeff Carlsen
Adventurer
I've heard great ideas about the Psion being a per-round class (like the Fighter with her CS).
It's the concept I would like to see explored. Have at-will powers like telekinesis, telepathy, and ego-whip, and then power-points that refresh every round and are used to augment those powers.
But that's not really related to the this thread unless you wanted to provide a way for the Psion to store power points from round to round though his actions. I suppose that would be a cool use for psi-crystals. Every round you can store power points in it, building them up to unleash a powerful effect.