Blogger now allows you to publish static information on stand-alone pages [no more than ten] linked from your blog. For example, you can use pages to create an About This Blog page that discusses the evolution of your blog, or a Contact Me page that provides directions, a phone number, and a map to your location.
I've skirted this problem by using Google sites for my external pages (e.g. the About this blog info at http://sites.google.com/site/aboutknowbodies/), but it's puzzling that Blogger.com hasn't offered this convenience until now - since they're owned by Google. Better late than never!