Also, as an engineer (and a Goblin engineer no less), I have access to two kinds of bombs that do siege damage. Next time I go to Wintergrasp I'll be sure to be well stocked with them. What can I say, explosions are fun. ;-)
Thanks to my joining on a whim, I was able to get two achievements as well: the obvious "Wintergrasp Victory" and the more surprising "Within Our Grasp." In the case last night, the Horde were on the attacking side and easily took the keep from the puny Alliance. It makes me feel really good inside knowing that I helped gain us the right to Stone Keepers Shards and opening up the raid instance inside the keep for our side. I might even work on getting all the Wintergrasp quests and work on them too. I even have half a mind to create a PvP spec when 3.1 hits with Dual Specs. Before now, I never thought about PvP very much, certainly not enough to get a spec or gear specifically for it, but with Wintergrasp it may be worthwhile.