Zebralight is coming out with a 6 mode, 3.2 inch, 1xAA SIDE clicky, sometime in 2014 (theoretically ;)).
-XM-L2 emitter
-the head is a little wider and ostensibly has a deeper reflector, so it will be a bit throwier than the sc52
-1/10 inch longer than the sc52
-max output is 400+ lumens, .7...