public function getIp(){
		if( (int) $this->lastCheck > 0 && time() - $this->lastCheck < 10 * 60 )
			return $this->lastIp;
		$this->reader->setUrl( 'http://checkip.dyndns.org' );
		$html	= $this->reader->read();
		$parts	= explode( ": ", strip_tags( $html ) );
		$ip		= trim( array_pop( $parts ) );
		$this->save( array( 'ip' => $ip, 'timestamp' => time() ) );
		return $ip;
	}