While Kelly Gallagher may not be a "Web 2.0 Tool," his website is a wonderful resource. I had the pleasure of attending one of his workshops on reading comprehension strategies, and I have been using his Article of the Week database ever since. Gallagher and his coworkers post PDF files of nonfiction articles on current event topics. I have students highlight main ideas, new words, and areas of confusion; they also annotate passages in the margins and then write a brief response to the articles. This is an excellent source for "beefing up" the nonfiction component in your curriculum.
Jessica Pilgreen is a high school English teacher, a Piasa Bluffs Writing Project fellow, and a technology enthusiast. The main purpose of this blog is to help her keep track of all of the fabulous tools out there that she has encountered, but if she can help a few others along the way, that's good, too.