great plugin i must say!!
I think there may be a slight issue if you use this plugin and have a custom wordpress installation. mines in (/wp/)
2 problems so far loading the js:
http://example.com/wp/?nscontactdialog=7f97b52ef8&nscdaction=add-dialogs&ver=1 returns a 403 error cant access dir
I changed "nscontactdialog.class.php" file on line 153 wp_enqueue_script('jquery-nscontact-jsonp') I added my absolute reference here that seem to do the trick.
2nd problem is when submitting the form it tries again to go to the /wp/ dir to get the response json, i'm just struggling to find out where I can change this setting to make this work?
any feedback would be appreciated.