Kontact

Right now I am testing Linux just for fun. I found out, that my Distribution comes with a PIM called Kontact. I have taken a look at this app and found out, that this could really be a good (portable) alternative to Outlook.
I read, that this application is in beta-testing, since more than one year (!) but have not found out, if they are still planning to release one for windows.
Now my questions:
1. Does anyone know about the status,
2. will that be a good app for portableapps?

Link: http://www.kde-forum.org/index.php?page=Thread&postID=64698&l=1

Thank you