bbPress Integration

Hi.

Yes you can. Have a look at this topic.

Hi.

Yes you can add in the logo as well if you want:

add_action( 'bbp_theme_after_reply_author_details', 'add_rank_in_author_details' );
function add_rank_in_author_details()
{
	$reply_id = bbp_get_reply_id();
	if ( bbp_is_reply_anonymous( $reply_id ) ) return;
	$user_id = bbp_get_reply_author_id( $reply_id );
	if ( mycred_exclude_user( $user_id ) ) return;

	// First echo the rank
	echo 'Rank: ' . mycred_get_users_rank( $user_id );

	// Second the logo (but you can change this)
	echo mycred_get_users_rank( $user_id, 'logo' );
}

You can find more information about the mycred_get_users_rank function in the myCRED Codex.