lucy24 - 8:38 pm on Sep 3, 2012 (gmt 0)
If you are at all concerned about accessibility, sitemaps are important. Many styles of dynamic navigation are not accessibility friendly, e.g. easily read by text readers for the visually impaired. Another consideration is that it provides a backup in the event your regular dynamic navigation fails. Remember, not everything works equally well in every browser, or for that matter device. Besides, it cannot hurt.
It sounds as if you're talking about a human-accessible sitemap page. I thought the question was about a made-for-robots file such as sitemap.xml