Ezra cites QandO, who offers poll numbers that show a great amount of support for creationism, and solid support for "Intelligent Design". The first thing to say here is that QandO's post doesn't accurately represent the poll results -- scroll down to the November 2004 poll on the issue and you'll see that the phrase "Intelligent Design" was not actually used in the wording of the original poll. The pollsters merely asked people if they believed that evolution was "guided by God". There's an interesting difference between the belief that evolution was "guided by God" and ID, and it's what I want to bring to light in this post.
Here's a position that I imagine is reasonably popular, and that would make you my ally, not my enemy, in the fight against incorporating ID into biology textbooks: You believe that God created the universe so as to generate beings like us and all the other wonderful creatures that populate our world. But you accept that setting up a universe where evolution would eventually occur is the process by which God generated everything. You agree with everything Pharyngula and the biologists tell you about the history of life on earth, and you oppose the people who try to alter textbooks to say otherwise.
Now, the position in the previous paragraph is one I disagree with, since I don't believe that God exists. But it's different from ID in that it contains no biological hypotheses in contradiction to evolution. All it contains is a cosmological hypothesis that ends up contradicting my atheism. As such, it's no threat to interfere with a good K-12 science education, since cosmological questions about why all the physical constants are set where they are don't get discussed in high school science classes. Eventually, when the kids go to college and my co-workers teach them the Design Argument and the Problem of Evil in philosophy classes, they'll have a chance to hear both sides of those controversies. But even if they come out of those classes embracing teleological arguments for God's existence, that won't make them count as ID supporters.