Using Microsift Word/Outlook for content publishing to WordPress

I wouldn’t recommend it but…

If you are not going to use multisite, then WordPress has a Post via e-mail feature setup under Settings > Writing. See http://codex.wordpress.org/Post_to_your_blog_using_email

An alternative might be to get them to use Windows Live Writer, which would give the users a familiar mircrosoft interface. See: http://explore.live.com/windows-live-essentials-help-center?T1=t7