For those new to mirrorless cameras, there are a coupe of sites that I know of where you can get pretty solid information on these systems.
Thom Hogan is a well-known professional photographer who has been writing about Nikon equipment for a long time. He has been moving into the mirrorless space and has launched a web site covering only that at Sans Mirror (http://sansmirror.com) ...
For US residents only, click the t-shirt image and enter the contest for a limited edition T-Shirt ... and for the rest of the planet, click the t-shirt image and read about mirrorless cameras ...
A second site that you should be aware of is Discover Mirrorless (I said wireless in the first version of this post – thanks Piotr) at http://www.discovermirrorless.com/ … this is one of Will Crockett’s sites, another and more famous of which is Shoot Smarter.
Will has a wide gamut of contributors that include some excellent professional photographers that are showing what can be done with mirrorless cameras, so this is a good place to do your research.
Of course, there is also the old standby at http://dpreview.com, where you can look at several forums covering m4/3, NEX and Nikon 1 cameras. Great stuff.