I order this lens from B&H photo and I cant wait till it gets here all I have herd about this lens is that it is really sharp and worth the money. This new lens does what many pros thought couldn’t be done – replace the previous L-series 28-70 f/2.8 lens with something even better. Extended coverage to an ultra-wide-angle 24mm makes it ideal for digital as well as film shooters, and the optics are even better than before with two Aspherical elements and a totally new UD glass element. It’s now sealed and gasketed against dust and moisture, and a new processing unit makes the AF faster than ever.To find out more information on this lens and other canon products click here.
Cooper Ricketts Photography Blog 
god i wish nikon had an cheaper equivilent that was cheaper(its 1700 for my 24-70 2.8). enjoy the new lens man. heard its dang good.
Im sure I will Canon had a bunch of rebtes on their lenes you should look and see if Nikon is doing the same