The trailers are at the main page, immediately below the text box in the center of the page.
They are formatted in Adobe Flash Player 9.
The first clip is from "The Powers That Be."
The second clip is from a featurette with Robert C. Cooper regarding "The Village" that was built for SG1's season nine and SGA's season two.
There's also one NEW wallpaper in The Gateroom section. It's two blue Jaffa standing to the side of the SGC Stargate.