Welcome to the IMC blog!
This post shows how to use Oracle AQ as an underlying JMS implementation with MDBs in Weblogic. MDB's can be very useful when you want to integrate your database logic with your Java application. Normally JEE application invokes the code inside the database. But in some cases you want the DB to initiate the asynchronous call and have your Java application do the actual processing. This is also very useful when you want to integrate JEE code with the Oracle Forms application.
The post has been based on the following OTN documentation:

http://download.oracle.com/docs/cd/E14571_01/web.1111/e13738/aq_jms.htm#CJACBCEJ

Detailed instruction is here:

How to connect MDB to Oracle AQ.pdf

You can also download a sample JDeveloper application here:

MDB_AQApplication.zip

Please feel free to ask questions and put comments.

Merry Christmas and Happy New Year!