Writing iCal

iCalendar
http://en.wikipedia.org/wiki/ICalendar

iCalendar Validator
http://severinghaus.org/projects/icv/

To identify values that contain human readable text:
(http://drupal.org/node/61830)
* For double quote use: DQUOTE
* For a comma use: \,
* For a colon use: ":"
* For a semicolon use: \;
* For a back-slash use \\
* For a new line use \n or \N