I found this worked pretty effectively:
First, add all the directories, but not any named "CVS":
find . -type d ! -name CVS -exec cvs add '{}' ;
Then add all the files, excluding anything in a CVS directory:
find . ( -type d -name CVS -prune ) -o ( -type f -exec cvs add '{}' ; )
Now, if anyone has a cure for the embarrassment of using CVS in this day and age...
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