"Game of Thrones" Websites You Might Like to Watch
If you're interested in looking at screencaps from the initial trailer that recently premiered, visit this Flickr account.
Jason was seen in the third teaser released in November 2010. Visit Solutions for the embedded video and a screencap with associated links.
[NOTE: I've made this posting the main go-to source for links about the show. You'll be able to get to it from Jason Momoa's page at Solutions.]