According to B&H shipping October 10. Planning to have this replace my 6D for night shooting, as a back up body, and just when I feel like it. Still have my 5DSR for maximum resolution in good light.
Absolutely. That's actually a big selling point for me. I have 4 lenses that I really like, including the TS-17, IRIX 11, Tamron 15-30, and the Rokinon SP 14 that don't take filters. Being able to add a CPL or ND without having to deal with that massive Wonderpana (for the lenses that even work with that system) makes me more likely to bring and use them on trips.
There is an issue with Uploading Photos (attachjments). I am not sure what the problem is, and I am looking into it. You can still try to Create your Threads and Upload your Photos, but it is hanging up during the Upload.