Most of Oracle Reports (.rdf) are likely to be converted to full fledged Oracle BI Reports in the next few versions of Oracle Apps.
Here are some fantastic blogs and articles by my fellow Oracle Apps Consultants
http://bipconsulting.blogspot.com/2009/08/oracle-reports-migration-to-bi.html
http://bipconsulting.blogspot.com/2009/08/oracle-reports-migration-to-bi_17.html
http://bipublisher.blogspot.com/2009/05/bi-publisher-reports6i-to-bip.html
