http://www.streetsmartlanguagelearning.com/2010/02/rosetta-s...
On the other hand, there are tools like Assimil which absolutely rock, but no one seems to have heard of them. The Foreign Service Institute (FSI) courses are decent and free (by law because they're in the public domain) but the main site hosting them seems down (http://fsi-language-courses.org/Content.php). Someone's tried to create "pretty" versions of the FSI courses at http://www.ielanguages.com/fsi/fsiproject.html, but they never got very far.
Update: some of the FSI courses are still available at the Internet Archive (http://web.archive.org/web/20130113232657/http://fsi-languag...), but the MP3s can't be downloaded.