OK, Here's what I had in my copy of bp-sn-parent named bp-sn-parent-members in header.php
<div id="header">
<h1 id="logo"><a href="<?php echo get_option('home') ?>" title="<?php _e( 'Home', 'buddypress' ) ?>"><?php bp_site_name() ?></a></h1>
<ul id="nav">
<li<?php if ( bp_is_page( 'home' ) ) : ?> class="selected"<?php endif; ?>>
<a href="<?php echo get_option('home') ?>" title="<?php _e( 'Home', 'buddypress' ) ?>"><?php _e( 'Home', 'buddypress' ) ?></a></li>
<li<?php if ( bp_is_page( BP_HOME_BLOG_SLUG ) ) : ?> class="selected"<?php endif; ?>>
<a href="<?php echo get_option('home') ?>/<?php echo BP_HOME_BLOG_SLUG ?>" title="<?php _e( 'Blog', 'buddypress' ) ?>"><?php _e( 'Blog', 'buddypress' ) ?></a></li>
<li<?php if ( bp_is_page( BP_MEMBERS_SLUG ) ) : ?> class="selected"<?php endif; ?>>
<a href="<?php echo get_option('home') ?>/<?php echo BP_MEMBERS_SLUG ?>" title="<?php _e( 'Members', 'buddypress' ) ?>"><?php _e( 'Members', 'buddypress' ) ?></a></li>
<?php if ( function_exists( 'groups_install' ) ) : ?>
<li<?php if ( bp_is_page( BP_GROUPS_SLUG ) ) : ?> class="selected"<?php endif; ?>>
<a href="<?php echo get_option('home') ?>/<?php echo BP_GROUPS_SLUG ?>" title="<?php _e( 'Groups', 'buddypress' ) ?>"><?php _e( 'Groups', 'buddypress' ) ?></a></li>
<?php endif; ?>
<?php if ( function_exists( 'groups_install' ) && ( function_exists( 'bp_forums_setup' ) && !(int) get_site_option( 'bp-disable-forum-directory' ) ) ) : ?>
<li<?php if ( bp_is_page( BP_FORUMS_SLUG ) ) : ?> class="selected"<?php endif; ?>>
<a href="<?php echo get_option('home') ?>/<?php echo BP_FORUMS_SLUG ?>" title="<?php _e( 'Forums', 'buddypress' ) ?>"><?php _e( 'Forums', 'buddypress' ) ?></a></li>
<?php endif; ?>
<?php if ( function_exists( 'bp_blogs_install' ) ) : ?>
<li<?php if ( bp_is_page( BP_BLOGS_SLUG ) ) : ?> class="selected"<?php endif; ?>>
<a href="<?php echo get_option('home') ?>/<?php echo BP_BLOGS_SLUG ?>" title="<?php _e( 'Blogs', 'buddypress' ) ?>"><?php _e( 'Blogs', 'buddypress' ) ?></a></li>
<?php endif; ?>
<?php do_action( 'bp_nav_items' ); ?>
</ul>
<?php do_action( 'bp_header' ) ?>
</div>
It made most sense to me that even if my users are in their own blogs, that the menu items do the following
Home ==> Site Home,
Blog ==> That member's blog
Members ==> Site Members
Groups ==> Site Groups
Forums ==> Site Forums
Blogs ==> Site Blogs
So this is what I did.
<div id="header">
<h1 id="logo"><a href="<?php echo get_option('home') ?>" title="<?php _e( 'Home', 'buddypress' ) ?>"><?php bp_site_name() ?></a></h1>
<ul id="nav">
<li>
<a href="http://community.urine-therapy.org/">Home</a></li>
<li class="selected">
<a href="<?php echo get_option('home') ?>/" title="<?php _e( 'Blog', 'buddypress' ) ?>"><?php _e( 'Blog', 'buddypress' ) ?></a></li>
<li>
<a href="http://community.urine-therapy.org/members/">Members</a></li>
<li>
<a href="http://community.urine-therapy.org/groups/">Groups</a></li>
<li>
<a href="http://community.urine-therapy.org/forums/">Forums</a></li>
<li>
<a href="http://community.urine-therapy.org/blogs/">Blogs</a></li>
<?php do_action( 'bp_nav_items' ); ?>
</ul>
<?php do_action( 'bp_header' ) ?>
</div>