This formation was printed in White Dwarf 373. It consists of three Stormravens, three Furioso Dreadnoughts (can use Librarian Furiosos), and three Terminator squads (can be regular or Assault). The cool thing about this formation is that the Stormravens are considered Flyers with the Hover Rule. The formation must begin the game in reserve, but then gets to fly in, drop off the three Terminator and Furioso units, and then the Stormravens can take to the sky again. It sounds really fun to play. It has some other features too, like being able to combine firing all twelve Bloodstrike missiles at a single target and getting to use the APOC blast template. It is not a cheap formation at 200 points plus models, but well worth the price for flying Stormravens.
My formation consists of one Librarian Furioso and two regular Furiosos. Two of the Terminator squads are Assault Squads with Thunder Hammers and Storm Shields (well, it is APOC). The third is a regular Terminator Squad with Heavy Flamer and one Chain fist. The Stormravens can be equipped as needed as you will see below.
Building the three Stormravens was quite a task, especially because I magnetized practically everything that could be magnetized, including the front guns and doors/Hurricane Bolters on all three. For the turrets, I only magnetized two of them. The third turret just has assault cannons. After building these three Stormravens, I hope to never build another. Here are some pictures of all the magnetizing I did.
Here is one set of magnetized bits.
With any luck, I will get to use this for the first time this upcoming weekend.