Names and email addresses are required (email addresses aren't displayed), url's are optional. emails in the comments are displayed but the source is encrypted to prevent email harvesting.
Comments may contain the following xhtml tags:
<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>