SO, I’ve had few hits on the blog lately from people using the search terms “will Game of Thrones follow the books.”
I can tell you in no uncertain terms I Have No Idea.®
My best guess is they will follow the books relatively faithfully, concerning major events, but some scenes not in the book have been reportedly written into the scripts. I’m not able to watch the show myself, as I don’t have cable, so I’m trying to keep up to an extent by following @GameofThrones on Twitter (the official Twitter account for the production) and @Westerosorg, the most complete fan site out there. Elio and Linda at Westeros.org probably have more info on the books and show than anyone; they’ve been on-set, gotten swagged by HBO with publicity kits, met GRRM, and usually tweet out what Martin writes on his own blog, http://grrm.livejournal.com/.
Sorry I can’t be more help than that, but since people are landing here looking for info I thought I could at least direct you to those who know more. I have to wait for the DVDs.