To get jQuery as the JS library for monorail I need to do the following:

1. Get the JS files from jQuery and jQuery.Validation, save those to /Content/Js/ (or where ever).

2. Implement the IMonoRailContainerEvents and IMonoRailConfigurationEvents interfaces on my GlobalApplication.cs file.

3. In the Initialized method add:

IAjaxProxyGenerator ajaxProxyGenerator = new JQueryAjaxProxyGenerator();
container.ServiceInitializer.Initialize(ajaxProxyGenerator, container);
container.AjaxProxyGenerator = ajaxProxyGenerator;

4. In the Configure method add:

configuration.JSGeneratorConfiguration.AddLibrary("jquery-1.2.1", typeof(JQueryGenerator))
    .AddExtension(typeof(CommonJSExtension))
    .ElementGenerator
        .AddExtension(typeof(JQueryElementGenerator))
        .Done
    .BrowserValidatorIs(typeof(JQueryValidator))
    .SetAsDefault();

5. In the layout file reference the JS files like:

<script language="javascript" type="text/javascript" src="${siteRoot}/Content/Js/jquery-1.2.6.min.js"></script>
<script language="javascript" type="text/javascript" src="${siteRoot}/Content/Js/jquery.validate.min.js"></script>

6. Use the Castle trunk source.

References:

http://hammett.castleproject.org/?p=238
http://groups.google.co.nz/group/castle-project-users/browse_thread/thread/eb5bb0e5b4560a97
http://endurotracker.blogspot.com/2008/09/jquery-and-monorail.html
http://www.nabble.com/jquery-proxy-generator-in-trunk-td19670846.html