Six people entered the contest for a copy of "Thunder of Heaven" by Ted Dekker. (@sumrthyme and @jgrubbs entered via Twitter.) As it turns out, before the contest ended there were two correct answers to my question: "Kiss" which was released in hardback on Jan. 6, 2009 and "Green" which will be released in hardback on Sept. 1, 2009.
Using a random number generator (a.k.a. a dice) and numbering the entrants in the order I received them, the winner is:
Congratulations! I'll be contacting you for your address via Twitter.