It will have to be pared down. Pretty much any novel must be pared down for the screen, but in Martin's case, we have a work that's based on (celebrated for) both complex plots and multiple viewpoints.
I just hope they're tactful about it and that they capture the spirit. I hope they have similar success as they did with the
Lord of the Rings. None of this stuff can be pulled off flawlessly, and you can't please everyone.
When is the release date? I see 2010....
[Edit: I see Spring 2011:
HBO Encouraged By 'Game Of Thrones': Network programming chief Michael Lombardo says the dailies look 'fantastic']
As an aside, we will see the guy playing Kahl Drogo be Conan next year:
Conan (2011)