As someone who, only weeks ago, abandoned Olympus in favour of Canon (could just have easilty been Nikon - or sony, I guess), I am not excited.
520 is a great camera but has serious limitations that made it no longer viable for me. Mostly, crap high iso perfomance.
4/3 is going to be far noiser than the Canikon crops.
m 4/3 - don't see this will be any different.
Scotty