There have been a fair number of questions and concerns about the use of mod_plsql and the Oracle eBusiness Suite. And unfortunately, this has created some confusion about what is and is not supported by Oracle. I know a fair number of customers, both large and small, who are successfully using Oracle Application Express and the Oracle eBusiness Suite just fine.
Steven Chan, who is a Senior Director in the Oracle Applications group, has recently blogged about the availability of a new whitepaper on MetaLink. The whitepaper entitled mod_plsql and Oracle E-Business Suite Release 12 (MetaLink Note 726711.1) is intended to discuss many of the issues around mod_plsql and the Oracle eBusiness Suite.