The story: This ship is part of the push by Grand Admiral Pellaeon to upgrade the post-Palpatine Empire (what the New Republic calls teh Imperial Remnant). The Admiral is old enough to remember the LAAT's used during the Clone Wars, and this ship is set to serve much the same role in the Empire. It carries elite Stormtroopers led by a Commando Troop officer. The complete crew includes: pilot, rear gunner, scout bike rider (and bike attached to the side of the ship), Commando Troop officer, and 6 stormtroopers. The craft has one large forward-facing cannon, four smaller wing-mounted (anti-personnel) lasers, and a rear-mounted heavy dual laser. The ship is also often used as a boarding craft. The hatch can magnetically seal against another ship, allowing the target ship to be breached.
The MOC: Most parts came from the new-ish Prehistoric Creatures Creator set. If you don't have it, I highly recommend it. Lots of great parts (and Wal-Mart has it marked down to $21). The cockpit glass is from a Slave I set, mounted as I have seen others do on other ships.
Top view. Top hatch open, and cockpit glass off. You can see the folks piled in here. It's a little hard to see, but the drop hatch is in the middle between the Stormtroopers that are facing each other.