new blog已经加上了，修改sidebar.php文件，加上一句话就性了～
<?php $current_site = get_current_site(); ?>
<li><a href="http://<?php echo $current_site->domain . $current_site->path ?>wp-signup.php" title="Create a new blog">New Blog</a></li>
<li><a href="http://<?php echo $current_site->domain . $current_site->path ?>" title="<?php echo $current_site->site_name ?>"><?php echo $current_site->site_name ?></a></li>
