Oracle has release new plugins to connect to Oracle Collaboration Suite. Now we have finanlly support for the newest Outlook versions of Microsoft.
Supported versions are now:
Microsoft Outlook 2007 (with Service Pack 1)
Microsoft Outlook 2003 (with Service Pack 3)
Microsoft Outlook 2002 (with Service Pack 3)
Microsoft Outlook 2000 (with Service Pack 3)
Besides this Oracle also released Oracle Desktop Clients for Oracle Calendar for Mac os X, Windows, Linux and Solaris. You can find more information and links where to download at the Oracle website.