A new Dreamweaver extension called Surveyor was just released that automatically generates HTML and XML sitemaps in Dreamweaver. It can crawl local sites or remote URL's and gives full control over the XML priority, update frequency and last updated options. It even automatically submits your sitemap to major search engines.
Do you have it? I just purchased it but I don't think it's working right. It only finds two of my files ......... any luck for you? (speaking of which, rite from webassist is not working right for me these days either).