Sep 28 notes

 * go over guestbook cgi application
   * CGI.pm version
   * roll-your-own version (hard; need to hack strings and URL encoding)

 * a bit more on regular expressions 
   split(/ /, $string)
   join( $char, @array)
   $string =~ s/this/that/g;

 * forms

 * cookies

 * set-env.cgi for debugging

 * security issues 
   * keeping user input within the bounds that it should be