got the game of thrones blu-ray the other night, and decided to see what the extras were all about last night. they are rough ridin' fantastic. usually tv show/movie dvd extras are just random thrown in crap that is never interesting, but these are really great. provides a lot of backstory and explanation for people like me who can't be bothered to read the books.
if you liked the first season, i would def suggest checking them out, it's well worth the price of buying the box set imo.