I want holocrons out.
However, to replace this, i have used what i think is an even more interesting credit-producing scheme.
First ofall, the Hutt's get the 'moisture farm' as their unique building and this generates credits for them. Anyway, all civs get the spaceport which is your center of trading.
When one is built, you can start trading with your allies, as in most games, but also, independant traders will start visiting your spaceport (entering and leaving off-screen), with this generating credits for you.
To me, this is more interesting, realistic and more fun than getting Jedi to grab holocrons, plus it makes your spaceport more realistic and important.
Dark Lord of the Purists
Inter Arma Enim Silent Leges