Just heard it pointed out on the Penn Jillette radio show that "We hold these truths to be self-evident" is iambic pentameter. Neat. He kept calling it "perfect" iambic pentameter, because his co-host kept trying to pitch a 10-syllable sentence as iambic pentameter as well. He kept saying that he was doing the whole thing with the emphasis on the syllables. That'd be the iambic part :).