Set up permanent (301 style) redirects from pages at yourblog.com to corresponding pages at www.yourblog.com, or you’ll end up with a duplicate site in the search engines. If you ever decide to switch blog platforms, maintain the old URLs through permanent redirects to preserve those valuable inbound links that point deep into your archives.
Make Blogging and RSS Pay Off by Driving Traffic and Sales Through Optimized Blogs and Feeds
Set up permanent (301 style) redirects from pages at yourblog.com to corresponding pages at www.yourblog.com, or you’ll end up with a duplicate site in the search engines. If you ever decide to switch blog platforms, maintain the old URLs through permanent redirects to preserve those valuable inbound links that point deep into your archives.