If you want to test the improved Java Application monitoring in SC 2012 R2 Preview here is the MP that will do that.
System Center 2012 – Operations Manager Component Add–On Updated
This component add-on represents Management Pack for monitoring Java Enterprise applications and the Sizing Help file for SCOM 2012. I couldn’t find what exactly has been updated as none of the documents seems to have new version but the publish date was changed to 21.03.2013. Download them from here.