I prefer the Sun extensions to Indian Hill for grepability but I see the appeal especially to folks that came from pascal. Look closely at the example echo.c, thats not "#include <stdio.h>" ;) We still have this included in lots of code where I work since it dates from around 1980:

  % grep '/\*' std.h
  /* std.h header file to allow use of Whitesmiths pseudo classes/types. */
  /* the pseudo storage classes
  /* the pseudo types
  /* system parameters
  %

And yes for me there are ~600 files I still regularly work in written in WS style.