Keeping an eye on things (competition)
 

I saw this on another forum and thought that it was a great forum building competition. They had certain points that could be scored:

Point-values:

* Create new thread: 10, 20 40
* Reply to a thread (50 characters minimum): 5 10
* Refer a new user that makes at least 10 posts: 50 100
* Sign up as a user who has been referred by another member: 10
* Purchase a paid subscription and earn 10 points for every dollar of the
package value. For example, purchasing the $15 6-month option will
yield 150 points.
* Submit an article, tutorial, tip, or other post for use on our blog: 25

How would you keep an eye on this? To see that from a certain date who has scored the most points.

Thanks,

Andy