Storm is working on bidirectional path tracing as far as I remember. Other than that make sure to check <a href="http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Reducing_Noise">http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Reducing_Noise</a> too.<br>