These cards were in an ad in Game Trade Magazine, so I figure it's okay to post them here. I find it funny that the cards that are pictured are Greyjoy and Martell:
Drowned Fanatic -- Greyjoy
Cost: 3
Str: 2, Mil, Int, Ironborn, Holy Crest
Response: After you win initiative, discard the top 2 cards of each opponent's deck.
Palace Spy -- Martell
Cost: 3
Str 2, Int, Ally
Some of the text on the card is covered by the Drowned Fanatic, so the stuff in (parenthesis) is my best guess: Response: After you (play Palace) Spy from your hand, (search your) deck for 1 influence (providing) location, reveal th(at card and add) it to your hand.(Then shuffle your) deck.
The last card is "Ahead of the Tide" Appears to be a House Greyjoy only event. Most of the text is obscured, but it appears to be something along the lines of if an opponent would win initiative, you can win initiative instead.
And I'm sure these were mentioned in the original release, but the ad also talks about Janos Slynt, Septon Cellador and Craster, and of course the "stackable agendas." This issue of Game Trader is for the January releases, so we'll have to wait until next year, but at least we should see Princes of the Sun in the next few weeks.