Wow, I seriously underestimated the number of instant messaging applications out there. I've been using MSN Messenger for a long time (hasn't everyone?) and now I work on Windows Std Server 2003 I can't - the two are incompatible, as is iTunes/WS2k3. So, I went looking for a replacement which might run on WinSrv2k3, and a quick google of "instant messenger comparison" brought me to this neat link:
Having said that, of course, there are plenty of tools, APIs etc out there to let you build your own instant messaging application - including an MSN Messenger app!...
Code and API's for developing with Microsoft's MSN Messenger service, found via:http://www.google.com/search?rlz=1C1GGLS_en-GBGB299GB309&sourceid=chrome&ie=UTF-8&q=c%23+msn ...
- http://forum.mess.be/index.php?showtopic=36
- http://www.codeproject.com/KB/cs/Connect_To_MSN_Messenger.aspx
- http://www.codeproject.com/KB/cs/MsnMessengerLogListener.aspx
- http://www.hypothetic.org/docs/msn/index.php - Out of date now
- http://msdn.microsoft.com/en-us/library/ms630960.aspx
- http://www.codeproject.com/KB/IP/connectingtomsn.aspx
A number of these utilise the DotMSN API:
- http://www.xihsolutions.net/dotmsn/ - An actual MSN Messenger API wrapped up for C# specifically