First you need to decide whether you want people to register on your site before they can comment.
Then you first need to make a register link available for them. You can either add the Meta widget (from Appearance -> Widgets) to your sidebar or you can use a template tag such as wp_register or wp_loginout.
Are you all set now? Ok with sorting out the comment side yourself?
so I got the meta widget up but can only people with wordpress accounts log onto my site?
No – anyone can register on your site now. Check that you have set the default membership role to Subscriber in Settings -> General. That way, all they will be able to do is comment.
