The basic Loom release includes the jar, css and javascript files, the javadoc, and the demo application and sources. There is also a separate bundle (loom-dependencies) that includes the jar dependencies.
Loom requires a JSP 2.0 container (at least tomcat 5 or Jetty 5) and java 5. The complete list of tested application servers can be found here.
The demo war file still requires JSP 2.1 (tomcat 6 or jetty 6) to deploy.
Loom is released under The Apache License version 2.0.