This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
If support for Tomcat 7 is not there I would ask on their mailing list when it will be, they are the only ones who would be able to answer that question. You say you got it working on tomcat 6. What are the problems/exceptions and stack traces you are seeing on Tomcat 7?