I just finished configuring the redirects for the old s9y urls. Posts, Feeds and Tags should now redirect to the proper wordpress pages. Unfortunately, the script I used to migrate the content left out the tags, so I retagged all the posts. On the bright side I now know which posts still need to be fixed because an image did not get uploaded or a link is broken.
I still need to think of a use for categories … so the site will be in flux a few more days. Lets see how google handles the new url, as http://blog.butonic.de now points to http://butonic.de, the new wordpress installation.