Almost all blog, wiki, and web content management tools these days support xml-rpc (a method that allows you to manipulate content remotely – for example you can have desktop software that lets you publish to your blog). We are getting very close to having the ability have truly free and interchangeable data. All we need now is a tool that asks you for the source site, the target site, and maybe some additional information (usernames and passwords, keep tags, keep dates, etc) and go. Of course we could also get fancy and add a filter to say only get content from the source that matches this criteria or that.
And to get even fancier, we could add formatting rules that would replace code as it goes (for example replace class=”style1” with class=”style2” or remove all <p> and </p> tags or change html to wiki syntax…).
If anyone out there knows of such a tool, or is willing to help me create one, let me know. It would be great for going Drupal to WordPress to MoveableType to Sharepoint to Blogger to Confluence to Joomla to … etc