For the last serveral years when it comes to measuring and analyzing my stats in real-time I prefer to use Reinvigorate over Google etc. Due to this I have just created a Github project for a Mango Blog plugin for adding the tracking code to your installation.
You can install it direct from your admin console using the following link:
I have tried submitting it to via Plugin-submission but my comments keep getting marked as span! I'll try that again later.
Check out the Git repo at https://github.com/andyj/Mango_blog_reinvigorate_plugin