Appearantly, Halo 3 is a big game. Forgive me if this is the understatement of the year. But appearantly, it's big.
What I find more interesting, is the Halo 3 game guide that was made in Silverlight. It's a real nice showcase of all that can be done in Silverlight.
And to think that it's REALLY not that hard to create all this eye-candy.
Want to see more? Go here: http://www.microsoft.com/silverlight/halo3.aspx