I'm curious if anyone out there has ANY info on the new Sigma 80-400mm F4.5-5.6 EX OS(Image Stabilization) lens. On paper (or computer screen), it seems that it's a nice competitor to the Canon 100-400mm L with IS, trading L sharpness for 20mm on the low end and $300 in price... however I have yet to find any information anywhere on this lens. For IS under a grand, it seems this lens and the older Canon 75-300mm are the big runners... I'm curious as to how the Sigma stacks up.
Thanks in advance,