I'm surprised that no one has yet mentioned the Jones bracket (no. J-120). It's great with this camera.
http://www.veachco.com/
A million years ago, when I shot weddings, I used to use this bracket with my Rollei TLR. I had a Graflex
electronic flash with a real heavy son-of-a-gun of a battery whose head had a threaded socket which allowed it to be attached directly to the bracket.
The Jones bracket is designed so that a mounted flash is positioned directly on the vertical axis of the lens, and way above it. This was great for wedding photography because it forces the shadows to "hide" behind the loving couple, instead of the "sidelong" shadow created by using side-mounted flash brackets. This also helps keep the dark-suited groom looking thinner because there's no dark shadow to merge with his suit! To allow waist-level viewing, the bracket is designed so that the flash is positioned a bit forward of the viewing hood, not above it.
The "high above the lens" flash position will also be familiar to portrait photographers who use 'glamour' or 'butterfly' lighting, which is especially flattering for photos of women (if they have bags, just have them tilt their chin up very slightly, à la Marilyn Monroe! Works wonders). I had many re-orders from brides who told me that they'd never seen themselves look so good in flash pictures. Mini-softboxes didn't exist at the time I used the Jones bracket, but they would be a logical addition today.
Next-to-lastly, the weight distribution of the camera/flash combination was more balanced with the Jones bracket than a side-monted unit.
Lastly, the thing is darned cheap, IMHO (No, I don't work for Jones ... but I think I've just convinced myself to get another bracket!)