I have never really found a simple set of rules for psionics. There are certain iconic attributes for psions that ought to be available at varying degrees of power, e.g. a psionic power blast, telekinesis, telepathy, but the end result for gameplay always seemed to be more cumbersome than necessary.
Therefore my next project will be a small digest of psionic rules, including some psionic enhancing and dampening items.
An important note is that in our game we always treated psionics as a power different than magic, so I'll need to take some hard looks at how psionic saves are dealt with for both psions & non-psions.
This should prove to be fun!