As you know GC 2005 had a new running trailer which featured new gameplay. However the version released on the web was not the full one by far. I spoke to my friend who attended and he said the trailer was closer to a minute and a half. He ever recorded some of the trailer himself and it features the Himalayas area in play wit slidey slopes, and some poll swinging action. You can see it here: Himalayas Gameplay Trailer
Here's some screens to tempt you until the full version is released in the September site update
I have some more goodies from GC including a postcard but I'll save those till later!