- sent messages; sender can delete unread messages (optional, see settings)

- messages splitted in pages, setting for "how many messages per page"
- privatemsg_get_link() to add theme support; see INSTALL
- throttle to limit abuse; setting in admin for max send rate
- checked sql indexing and added index to recipient
- save sender ip address
- code cleanup (less global variables, use drupal form functions, better date format in list, comply to coding standards)
- minor cosmetic changes