I have experimented with the compensation settings for both flash and regular exposure. I have found that +0.3 for BOTH flash and normal exposure is about right for my type of shooting. Yours may differ!
I tend to shoot pretty high contrast stuff like sunsets, and deer partially in shadow and direct sun. So I have seen the best and the worst that this D100 can do. So far, it blows out detail if a high contrast situation exists. I am having to expose for the highlights, so I won't lose all detail there, and then open up the shadow detail in Photoshop afterwards. If I open up the shadow detail too far in Photoshop though, it tends to blow out the highlights too. But, I do have a little more control in Photoshop.
I am NOT disappointed in the D100. It has been the most fun of any camera I have ever owned. For instance, just today, I took 177 pictures at a face painting session. I estimate that to be about $62.00 worth of processing, if I had used Provia. In the last week, I have been exuberantly shooting everything that moves, or stands still. I have taken over 500 images since 08-12-02, when my D100 arrived. Some complain that the D100 costs too much. Well, figure the cost on 500 images at thirty-five cents USD each. That amounts to $175.00. My entire investment in the D100, lenses, filters, and IBM Microdrives is standing at about $3,300.00 USD. So, I have saved $175.00 in one week, which goes a good way toward paying for the investment. In a few weeks of shooting, I will have overcome the cost of my camera system in processing fee savings. Hee hee! But, this is completely off the subject.
Here is an image exposed at +0.3 EV flash exposure using the on-camera flash, and front-curtain shutter sync.