If you re-read the first book you see that Tommen and Tyrion have the same color hair and that Tyrion is not the only Lannister with pale blonde hair.

I loved the final sequence and liked the surprise of them all begin together, but will be very disappointed if the first episode of the third season isn't a long flashback of how they did it.

I brought A Storm of Swords to jury duty knowing I'd be there for hours doing nothing and needed a long book. Hit the Red Wedding and started crying really grossly.

I was about to send this article to my mom (who doesn't watch the show but just finished ACoK) before I realized that it has spoilers for ASoS so I better wait until she gets through it.