I have some limited good news to report and some not so great news. The good is that the accessories like lens hood, filter adapter and EF-20 flash will be shipping very soon. Probably in the next week. The bad news is that the Leather Case has been delayed. There will be a significant delay on this and I will update the exact info once I know it. We will have to wait a couple months is my guess. For now I am going to see how it breaks in on my camera.
You cannot use it with the lens hood on - but yes for the filter adapter. Update - I highly recommend that you buy a multi-coated filter. If you buy a less expensive single-coated filter you WILL see more flare in your (nighttime with light source) images. Other than that - filter style and brand is really your call. I think we all see the wide price ranges from Tiffen & Kenko to Heliopan, B&W and the others.