Index: bp-core/css/admin-bar.css
===================================================================
--- bp-core/css/admin-bar.css	(revision 557)
+++ bp-core/css/admin-bar.css	(working copy)
@@ -53,6 +53,14 @@
 			background: url( ../images/admin-menu-arrow.gif ) 88% 53% no-repeat;
 		}
 
+		#wp-admin-bar ul .bp-login { /* all list items */
+			background: url( ../images/blogadmin_icon.gif ) 88% 53% no-repeat;
+		}
+
+		#wp-admin-bar .bp-signup {
+			background: url( ../images/invite_bullet.gif ) 88% 53% no-repeat;
+		}		
+
 		#wp-admin-bar ul li ul a {
 			color: #666 !important;
 		}
Index: bp-core/bp-core-adminbar.php
===================================================================
--- bp-core/bp-core-adminbar.php	(revision 557)
+++ bp-core/bp-core-adminbar.php	(working copy)
@@ -7,13 +7,40 @@
 		return false;
 
 	echo '<div id="wp-admin-bar">';
-	echo '<a href="' . get_blog_option( 1, 'siteurl' ) . '"><img id="admin-bar-logo" src="' . site_url() . '/wp-content/mu-plugins/bp-core/images/admin_bar_logo.gif" alt="BuddyPress" /></a>';
+
+	// **** Do bp-adminbar-logo Actions ********
+	do_action('bp-adminbar-logo');
+
 	echo '<ul class="main-nav">';
 	
-	// **** "My Account" Menu ******
-	
+	// **** Do bp-adminbar-menus Actions ********
+	do_action('bp-adminbar-menus');
+
+	echo '</ul>';
+	echo '</div>';
+}
+
+// **** Default BuddyPress admin bar logo ********
+function bp_adminbar_logo() {
+	echo '<a href="' . get_blog_option( 1, 'siteurl' ) . '"><img id="admin-bar-logo" src="' . site_url() . '/wp-content/mu-plugins/bp-core/images/admin_bar_logo.gif" alt="BuddyPress" /></a>';
+}
+
+// **** "Log In" and "Sign Up" links (Visible when not logged in) ********
+function bp_adminbar_login_menu() {
+	if ( !is_user_logged_in() ) {	
+		echo '<li  class="bp-login"><a href="' . site_url() . '/wp-login.php?redirect_to=' . urlencode(get_bloginfo('siteurl') . $_SERVER['REQUEST_URI']) . '">' . __('Log In', 'buddypress') . '</a></li>';
+		// Show "Sign Up" link if registrations are allowed
+		if (get_site_option('registration') != 'none') {
+			echo '<li class="bp-signup"><a href="' . site_url() . '/wp-signup.php">' . __('Sign Up', 'buddypress') . '</a></li>';
+		}
+	}
+}
+
+// **** "My Account" Menu ******
+function bp_adminbar_account_menu() {
 	if ( is_user_logged_in() ) {
-	
+		global $bp;
+		
 		echo '<li><a href="">';
 	
 		echo __('My Account', 'buddypress') . '</a>';
@@ -47,10 +74,12 @@
 		echo '</ul>';
 		echo '</li>';
 	}
-	
-	// *** "My Blogs" Menu ********
-	
+}
+
+// *** "My Blogs" Menu ********
+function bp_adminbar_blogs_menu() {
 	if ( is_user_logged_in() ) {
+		global $bp; 
 		if ( function_exists('bp_blogs_install') ) {
 			$blogs = BP_Blogs_Blog::get_blogs_for_user( $bp['loggedin_userid'] );
 
@@ -90,10 +119,12 @@
 			echo '</li>';
 		}
 	}
-	
-	// **** "Notifications" Menu *********
-	
+}	
+
+// **** "Notifications" Menu *********
+function bp_adminbar_notifications_menu() {	
 	if ( is_user_logged_in() ) {
+		global $bp;
 		echo '<li id="notifications_menu"><a href="' . $bp['loggedin_domain'] . '">';
 		_e('Notifications', 'buddypress');
 	
@@ -117,9 +148,11 @@
 		echo '</ul>';
 		echo '</li>';
 	}
-	
-	// **** "Blog Authors" Menu (visible when not logged in) ********
-	
+}
+
+// **** "Blog Authors" Menu (visible when not logged in) ********
+function bp_adminbar_authors_menu() {
+	global $current_blog;
 	if ( $current_blog->blog_id > 1 ) {
 		$authors = get_users_of_blog(); 
 	
@@ -146,9 +179,11 @@
 			echo '</li>';
 		}
 	}
+}
 	
-	// **** "Random" Menu (visible when not logged in) ********
-	?>
+// **** "Random" Menu (visible when not logged in) ********
+function bp_adminbar_random_menu() { 
+	global $bp; ?>
 	<li class="align-right">
 		<a href="#"><?php _e( 'Visit', 'buddypress' ) ?></a>
 		<ul class="random-list">
@@ -164,12 +199,17 @@
 			<?php endif; ?>
 		</ul>
 	</li>
-	<?php
-	
-	echo '</ul>';
-	echo '</div>';
+<?php
 }
 
+add_action('bp-adminbar-logo','bp_adminbar_logo');
+add_action('bp-adminbar-menus','bp_adminbar_login_menu',2);
+add_action('bp-adminbar-menus','bp_adminbar_account_menu',4);
+add_action('bp-adminbar-menus','bp_adminbar_blogs_menu',6);
+add_action('bp-adminbar-menus','bp_adminbar_notifications_menu',8);
+add_action('bp-adminbar-menus','bp_adminbar_authors_menu',12);
+add_action('bp-adminbar-menus','bp_adminbar_random_menu',100);
+
 add_action( 'wp_footer', 'bp_core_admin_bar' );
 //add_action( 'admin_footer', 'bp_core_admin_bar' )