modules for building ajax application and friendly urls? I'm building an ajax application using drupal 7, i found a module with some help ajax_nodeloader, but also i need load panel pages, views, etc.

Until now i'm overriding template theme file (zen) for ajax requests, and trying to use jquery address for good seo.

Also i will use jQuery UI Layout Plug-in on my template.

Which modules do you recommend ?
You shouldn't need an additional module, Drupal's AJAX framework should provide the needed features. For instance, it can easily be used to ajaxify links.

See the AJAX Example, AJAX Graceful Degradation and AJAX Commands example modules for API usages.