I have a 17 month old as well, and all I can say is this is my least favorite age. My daughter is 4+ and she terrorized me from about 13-19 months and then we had a wonderful time for awhile.
My son is even worse, he's trying to bring the roof down on our heads. I am responding by parenting the best I can, taking deep breaths, leading by example and hoping this horrific phase ends very soon.
Danielle, Nick, Gigi ('08) and William ('11)