Kirk,
I know. That will show the binary data that makes up the "MakersNotes". But, it doesn't decode it. Which is why I asked if you knew of a tool that did.
Scott, but exiftool DOES decode the makernotes, and quite thoroughly at that too! Have a look at the various options in its manual and I'm sure you'll be able to find the answers you need.
By the way, Nikon makernotes in themselves aren't that hard to decode at all (heck, before I found exiftool I had written a rudimentary script that was able to do so myself); like the rest of the meta date in the RAW file, they too follow the TIFF structure. After that it's just a matter of understanding what each field means. Only a very limited number of the fields are encoded in a complex way, most of these exiftool is able to decode too.
Cheers,
Hayo