Now, a few months later: I'm still working on it, got a bit caught up working on my guestbook module and the many 2.4 issues with my portal projekt.
Today I committed a lot of fixes but also some enhancements concerning the whole message handling underneath. If not using nicknames (forums module), you normally don't want name/last name etc. be shown. also there could be a lot of people having the same name...
fixed:

• many issues concerning 2.4 compatibility
  
• bugs in message handling
  
• display bugs
  

• ajaxLoading animation *g*
  
• multiple receivers, comma separated
  
• names will be displayed: name first letter of lastname (stripped email address, like me@xyz...) to have kind of unique usernames if not in "nickname" mode
  
• made the "send message" form available in other modules. This means: You can call the form i.e. via jQuery.load() and give it a user ID as a param. The form will be displayed without "receiver" field, only subject and body. Could be usefull when using it in forums, for example.
  
• added a text field in the backend where you can specify the sender address for email notifications sent to the user. If not set, 'noreply@' . $_SERVER[ 'HTTP_HOST' ] will be used.
  

I've built this module for my own portal project but if anyone is interested to join the development or in new features, please feel free ;-) Since the module is already submitted as a module-request to ss, I hope this will soon be accepted (waiting like 2 month now)

Regards,
Marc

Hi monkee,

just get the latest version from svn:
http://aschmann.org/svn/mod_privatemessage/trunk/privatemessage/

I've added some documentation when I checked it in with silverstripe as a module - but still no response ;-)
If you're interested in helping with the code/coding, I can give you svn access. I'd say: Write me a private message, but the forums are still missing that *cough*

Regards,
Marc

Hi Manfred,

yes, that's the basic idea of the PM module - but since it was not developed any further, I built it all again from scratch
The module *should* work on 2.4, buit I only tested/developed on rc2 with both, guestbook and privatemessage... But I think I fixed most problems.
If I find some time, I'll build a new version with full 2.4 support.

Regards from Germany,
Marc

I'll be releasing a full-featured, scalable messaging module very soon if you can wait a month or so. Just doing some alpha testing right now.