Anonymous users' comments must be approved by the site administrators before they are published. As a registered user, your submission will be published as soon as you submit it.
If someone posts a comment on any of your submissions, you can opt to have a notification email sent to you.
If you wish to keep track of particular discussions or other content, you can select to have the system automatically notify you by email.
Anonymous users are only allowed to post on exisiting forum topics, as a registered user you may create your own new discussion topics.
You may opt to allow other users to contact you by e-mail via your personal contact form, without disclosing your email address to other members of the community.
Registered users are also able to post other types of content. For example you are also able to submit your own events and web links.