Bill Chiarchiaro , Nov 04, 2006; 07:35 a.m.
The Nikon DSLRs that I've used do indeed put the focus distance into the EXIF data. I haven't used the D200, but I'd be shocked if it doesn't do this too.
This program is updated every few days with new features. I use it on Unix and Windows XP computers; it would work too on OS X. You can easily customize it to show as much or as little of EXIF data as you want, in whatever format you want. It is a command-line program, and you'll need to install a Perl interpreter. Take a look at the ExifTool Web site.