BuddyPress.org

I’d like to build a widget for this, but for now you can do this in the sidebar:

<div id="profile-badges">

<?php

$users = get_users_of_blog( $current_blog->blog_id );



foreach ( $users as $user ) {

$user = new BP_Core_User( $user->user_id );

?>

<div class="profile-badge-avatar"><?php echo $user->avatar_thumb ?></div>

<div class="profile-badge-name"><?php echo $user->user_link ?></div>

<div class="profile-badge-active"><?php echo $user->last_active ?></div>

<?php } ?>

</div>

That will print a profile badge for every user with privileges on a blog.