$post.ApplicationType - string - "Weblog", "Forum", "Gallery", or "Wiki"
$post.Body - string - The main body of the message.
$post.PostDate - DateTime - The time when the post was created.
$post.PostType - string - "Text", "HTML", "Xml", or "All".
$post.Section - Section - The blog, forum, media gallery, or wiki the post is in.
$post.Subject - string - The subject of the message.
$post.Uri - string - The web address of the post.
$post.User - User - The user sending the message.