Oracle 10g Release 2 for Microsoft Windows - Developer's Release is available
Ok, I'm not sure how I missed this, but I did. It was added on August 3rd. Oracle has put out a Developer's Release of Oracle 10g Release 2 for Windows. Now, you can try out the features that Alex and Christian mentioned in their MSDN Webcast.
http://www.oracle.com/technology/software/products/database/oracle10g/index.html