I'm somewhat of a pacifist. Though I haven't worked through my position on the subject to any great certainty.
I really like the book
The Peacemaking Remnant Morgan Douglas, ed (Silver Springs, MD: Adventist Peace Fellowship, 2005) It has some hard hitting articles and it includes a number of historical documents on the Adventist position on war. The basic premise of the book is that the idea of the biblical remnant (that holds a special place in the Adventist identity) is particularly tied to peacemaking. That is, standing for non-violence, being a prohetic witness to your time, and actively nurturing
shalom (a wholeness and well-being of life, not just "peace") This is very much in opposition to the idea of the remnant as a specially elected group (with an exclusive ticket for escapeing this world) that only preaches doctrine to the world.
Check out
www.adventistpeace.org