I doubt there will be anything between Barry and Sookie, but then again Mrs. Harris has surprised us with more, so maybe.
I actually love Ryan Kwanten as Jason, he has that strange sexy look and the stupidity (acted... i hope.) rolled up in one. But i've always loved Ryan in movies. I was definetely surprised by seeing him in TB though, he's not what i had in mind while reading the books, but still i think he fits, somewhat. But thats my opinion and i see where you coming from.
No they havent showed Claude, that i'm aware of, but i too would LOVE to see who they have in mind for him. If he's not delicious i will be highly dissapointed. It's going to be very hard to cast a role for someone as perfect as Claude though. No matter who they cast there's going to be some people that wont like him one bit, which will ruin the godlike image in everyone's head.
Apparantly they have decided they need a Claude, check this out:
Fairytales are more than true: not because they tell us dragons exist, but because they tell us dragons can be beaten. -Neil Gaiman