This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Hi Jaime, I am not sure about the official word from Apache.org for the exact min hardware specs. However, Tomcat is not a resource hungry product and the least specs I've worked on goes back to a server with pentium pro 200MHz & 256 MB of RAM and it never had any problems. It all depends on the web application you are trying to run. Hardware specs would just be a wild guess. If you are really keen then perform load testing of your applications.