Currently the comment fields are restricted to the following only: Name / Email / Website / Comment.
It would be nice if wordpress allowed the website designers to create additional comment fields such as:
Name / Email / Twitter ID / Website / Age / Country / (other CUSTOM_FIELD) / Comment
I was informed (thanks @jeremyclarke) that there is a way to do this using add_comment_meta() - but this requires a lot of back-end coding work which may be out of the reach of newbies. I also understand that this will not be included in 3.0 yet (sigh).
I could not find any plugins to do this (there are lots of plugins that can add custom fields to posts, though). A good CMS/blog should have an easily-modifiable comment system, to complement the excellent post system.
Would some kind soul like to create a plug-in that would help us add custom fields to our wordpress comments?