You can change the order/nesting of topics using drag and drop
File attachments
Files can be attached to any topic. The action of attaching a file to a topic is similar to attaching a file to an e-mail - use the Attach link in the footer of any topic viewed with the default PatternSkin.
Features:
Browse file to upload
"Link" checkbox - to inline images
"Hide file" checkbox
Version control
"manage" link to see older revisions and to change properties