Tested but seems the camera flash compensation setting does not work. Say I use M f5.6, 1/60s, normally with Canon I +1 flash and bounce, but D100 does not work. So I changed SB28 to f8 using A mode, and TTL does not work??? Then it seems better. For low ceiling I have no problem, but what I am afraid is high ceiling open space, how noisy is the ISO800? Anyone use it for indoor dark environment?
Am equally surprise that you bought a Nikon! From your website it seems that you have quite a number of Canon stuff! What was the reason for change of system?
I think based on your experience (you are definitely not a newbie!) you would know that using flash on digital is quite tricky as the TTL does not work the same way as film. Perhaps you would like to read the following link from a professional photographer:
You may want to consider using the Stofen Omnibounce especially when the ceiling is high. It helps to throw some direct lighting on the subject while diffusing to light the background. I have been using it for many events shots and yielded pretty good results. Here's a pic taken while covering a baby celebrating 1 month old using the SB28 flash (without DX) with the omnibounce.
I think bottomline is that you need to try out the flash in various situations to get a feel of it before the big day!
So far I find the Nikon flash system yield great results. I used to be on Canon too and found one irritating problem: The flash cast shadows of my lens in the pic and tend towards overexposure. This was one of the reasons that made me switched to Nikon! Have never looked back since!