There is no "Struts" plugin available through this channel. The tools available through Callisto are general Web development tools. While they can be used to develop Struts applications, they are not exclusive to Struts. The main plugins you need are the Web Standard tools and the
J2EE Standard tools and their dependencies.
Once you have the web development environment set up, I've found that the best way to set up a Struts project is to import the struts-blank.war that comes with the Struts download and make that the template for your project.
The "new Local", "new remote", etc. simply give you the ability to point the updater to either local or remote sites that are not in the standard list to install new plugins. They are not useful when setting up a basic web development environment.
[ February 19, 2007: Message edited by: Merrill Higginson ]