SeqAn hast moved it's Tutorials and HowTos to <a href="http://seqan.readthedocs.org/en/master/index.html">Sphinx</a> <br>
And its version control and bug-tracker to <a href="http://github.com/seqan/seqan">Github</a> <br>
Please update your bookmarks, this web-site will be removed soon.