If you are using Wordpress, most themes contain a 'No Sidebar' template and you can use that. For this client we created a special template that removed the theme's extraneous background colors.
Typepad users may be frustrated because they can't select the template on a page-by-page basis and don't have a way to eliminate the sidebar. Here's the trick but it requires a PRO level Typepad account: Create another blog in the same account. Select the same theme and give it all the same stylesheet customizations. Then select a Layout that contains no sidebars.
The final thing you should do is to give the landing page it's own short memorable domain name. GoDaddy makes it very easy to forward a domain name to a specific page on your blog.