Make sure that you have changed the semester to "Fall 2010". If they are still not showing up I would recommend waiting until the first day of classes, because that may mean that your teacher hasn't posted the list yet.

Go to the CU bookstore website http://www.cubookstore.com/. Scroll the mouse over "Books" in the gold bar at the top of the page, when the drop down menu appears, click on "Buy Textbooks." Once you click on the "I HAVE READ THE TERMS AND CONDITIONS..." link, then you'll get to a page that lets you select your classes. Select the campus and term (Fall 2010 is available, but Spring 2011 isn't yet). Select you classes, and click "Add to Course List" for each one. On the right is a box that says "Your Course List." Click "Choose books." Select one of the options when the window about used book availability comes up. Then, you'll get your booklist. You can click on "Printable Book List" close to the top right. You don't have to commit to buying your books online to access your booklist.