Problem running rst2html from command line
Try port contents py27-docutils | grep rst2html. It will tell you there's a /opt/local/bin/rst2html-2.7.py file, i.e. you can run rst2html-2.7.py on your command line.

The additional -2.7 in this filename is necessary to avoid conflicts between the different py*-docutils packages for different versions of python, e.g. if you want both the 2.7 and the 3.4 version installed. Of course you can create a symlink so you can use rst2html.py as usual:

sudo ln -s rst2html-2.7.py /opt/local/bin/rst2html.py