Deploying Tapestry applications into Tomcat is (no longer) any different than deployment using Jetty (previously, Tomcat deployment required more effort).
Tapestry 5 has been tested with Tomcat 5.5.20.
If your application has an index.html file, Tomcat appears to use that file, rather than triggering the Tapestry filter to render the application Start page for a base URL (just the context path).
By contrast, Jetty favors the filter over the index.html file.