"Toll the Hounds" is in paperback in the US. "Dust of Dreams" might be in hardcover in the UK, but I'm not sure (UK gets them first).
There was another massive thread about a year ago on this topic that is well worth searching for. I'm also looking forward to hearing people's current opinions.
Here it is (wow...make that 2.5 years ago):
http://forum.shrapnelgames.com/showthread.php?t=34325