SmartViper – a web service that collects and analyzes any data about domains and keywords they are optimized for.
This is a service worth checking out. Like all Site Analysis type services, it's not perfect. But, it provides some great information that will provide a lot about your site clicks, keywords, backlinks, etc...
Okay, here's the deal. It's take a while for the Ning Analytics Box to "catch up", sometimes. I ran the invalidate cache URL, and mine worked. I'm sure you know, but in case - - you must be signed in as Creator to run this URL. http://yourning.com/lib/scripts/invalidateCache.php
Then, as Tom stated, be sure to add the code from the "Insert HTML Code" drop down option. Also, be sure to grab the entire code, including the beginning < all the way to the ending >.