Mass Import/Export of products - yes, this functionality is called DataFlow. You can read more about this feature here:
Tell a Friend about a product - This functionality is not available with the latest release but is on the roadmap.
Special Order Instructions at checkout - This will be available in the next major release coming this July. Watch a short video about this functionality here:
WYSIWYG Editor for the CMS - not available with the latest release but may be added by the community as an extension through Magento Connect soon.