I have just recently added the WP Stats Dashboard plugin to my blogs. For me this a very useful plugin.
From the WordPress site the following has been written:
Display your blog’s stats graph plus your blog traffic, social engagement and social influence directly in your dashboard. See how you’re ranking on Alexa, check out your Technorati authority, monitor your ranking across multiple sites and much more. Once you install this plugin you’ll wonder how you ever managed to track your social media worth without it.
Notable features:
Lots of stats dashboard widgets
Tracking 50+ social metrics
Trending social metrics over time.
Autopost to Amplify and Posterous.
Sidebar widgets: social metrics, social profiles, total views, graph views per day
Profile finder.
Export Social Trends to excel.
iGoogle gadget.
Iphone App Available
Shop on Amazon to find what you need