This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
My recommendation would be that you not use the Struts DataSource at all. The best practice for DataSources is to define them in your Application Server, and then use a JNDI (Java Naming and Directory Interface) lookup in your application classes to get reference to one of them.