Yup adding on to what admin said the way to track outbound clicks is with the Google Analytics GA Event. In the miniadspot module enable this under the Enable Analytic tracking option. The module will then automatically add some javascript which for GA Event is like this,
<a onclick="javascript: pageTracker._trackEvent ('mycategory','click','Some Ad Name'

;" rel="nofollow" style="text-decoration: none;" target="_blank" href="
example.com/buyme"> etc etc
Then in your Google analytics you need to read
code.google.com/apis/analytics/docs/trac...entTrackerGuide.html to workout how to set that up.
As you can see the "category" is set as "mycategory" and this comes from the Miniadspot option, "Campaign group or Event" that you set. The "action" is fixed (by me) as "click" and the "optional_label" is the ad title/caption/name.
The only caveat is that I (who added this bit of code) hasn't tested this as much in anger as I would like to have done) so any feedback would be appreciated.