Take notice of content posted by guests in the new IPS 4.4. feature "Post Before Registering". You will see the content posted in a popup. Example. it won't show you the whole topic or article fields; it will show you only the content posted by the guest in the CONTENT/DESCRIPTION field.
Places where the content is shown:
Admin CP Community module
Front-end: Moderator CP
View the list
View the content of the posted item
As requested by IPS, this very first version won't allow any interact with the content beyond viewing. In a future version (NO ETA), you will be able to delete and assign the content to a member.