2 navigation areas with pages..not posts

“There may not even be a blog on this site.”

But to be clear, you WILL be running WordPress, right?

Use the wp_list_pages template tag. With that and some powerful plugins such as Exclude Page from Navigation and Page Mash, you can create some powerful and very customized navigation for your site.

Codex article on wp_list_pages template tag:
http://codex.wordpress.org/Template_Tags/wp_list_pages

Exclude Pages From Navigation plugin:
http://wordpress.org/extend/plugins/exclude-pages/

Page Mash plugin:
http://wordpress.org/extend/plugins/pagemash/