Hi,


It seems there is an interest to install blank-mode package in the Emacs 
distribution.

blank-mode is a minor mode to visualise blanks (SPACE, HARD SPACE and TAB).

blank-mode uses two ways to visualise blanks: faces and display table.

  * Faces are used to highlight the background with a color.  blank-mode 
uses
    font-lock to highlight blank characters.

  * Display table changes the way a character is displayed, that is, it
    provides a visual mark for characters, for example, at the end of line
    (?\xB6), at spaces (?\xB7) and at tabs (?\xBB).

The `blank-style' and `blank-chars' variables are used to select which way
should be used to visualise blanks.

To see some screenshots and documentation:

    http://www.emacswiki.org/cgi-bin/wiki/BlankMode


Send your suggestions, comments, etc.


Vinicius