The next client release has those combos listed in the skill descriptions. But the only one other than the one you just mentioned is that if you have Armed Command and Advanced Orbital Defenses you can convert Battleships into Missle Defense Platforms.

There's no delay on the conversion process since Cruisers cost more to build than Energy Arrays and it's a permanent conversion so once they're converted into an energy array / missle platform they can't be moved from that planet.