I know there are allot of content management system for hole sites,
Drupal Geeklog Joomla Mambo Open Source PHP-Nuke phpWCMS phpWebSite Post-Nuke Siteframe TYPO3 Xoops, etc

but I was wandering what would be the best way to let someone edit a hole page, e.g. if all the had on their website was one page.

Or there was just one page a html illiterate person wanted to edit them self (e.g. www.domain.com/mypage/index.php with www.domain.com/mypage/admin/ with a WYSIWYG editor)- any cms out of the box installations for this or what would be the easiest to modify for one page editing. Sorry I am new to this and have no idea.