If you have a True or Paid Account, then yes. Please note True Account requires a real company email address (v.s. free email addresses).
By default, all your files are secure and private, they cannot be linked from any other web pages. However, you can easily select a folder and click on Publish button in the toolbar. Once a folder is published, you can use the Publish URL to link to the folder or files in it. The Publish URLs can be used in any forum, eBay or My Space. No logon is required.