One of the highlights of GamesDay 2009 for me was the fantastic Ork Shanty Town display that Forge World did. There were many of the new Forge World models including the excellent Mega Dread.
I really like this model, which combined with Killa Kans and Dreadnoughts gives the Orks a variety of walkers that you would expect to find in their forces. Mine is well under way and I used it (in an undercoated state) in a recent game.