New User Registration Hooks

What are some of the hooks for New User Registration…specifically meta data?

I want to create some custom user fields that are required upon registration, then have that information emailed to me when they register, I see the notify administrator of new users but, is there a hook to tie into that internal notification system?

Thanks.

P.S – Thanks to wabsnasm, I use this form on a url.com/register/ page without having to use the wp-login.php page

if( !is_user_logged_in() ):?>
				<div class="loginform">
					<p>Please enter your username and password to continue</p>
					<form method="post" action="<?php bloginfo('url') ?>/wp-login.php">
						<div class="formbox">

							<label for="user_login">Username:</label> <input type="text" name="log" id="user_login"><br />
							<label for="user_pass">Password:</label> <input type="password" name="pwd" id="user_pass"><br />
							<input type="hidden" name="rememberme" value="forever">
							<input type="hidden" name="redirect_to" value="<?php the_permalink(); ?>">

						</div>
						<p><input type="image" src="<?php bloginfo('template_directory') ?>/images/login-button.gif" value="Log in" name="wp-submit">
					</form>
				</div>
			<?php
			else:
			?>
				<div class="pagebody">
					<?php // the loop goes here ?>
				</div>
				<?php get_sidebar(); ?>
			<?php
			endif;