At OracleBrains.Com blog, I have found a series of posts about Oracle JDeveloper, that have been written by Oracle Forms developer. Those posts are published under - Journey of a Form Developer to JDeveloper World title. It sounds really cool, doesn't it?
I should notice, that it is a positive sign, it shows that people who have strong background in so called traditional Oracle technology (Oracle Forms, Oracle Reports, etc.) are looking or starting to look into J2EE also. In my opinion, those posts could be a good jump-start for 4GL folks, who are new in JDeveloper world.