Gecko is the best I've found so far and the API is incredibly intuitive and really allows you to implement statistics from anything. If your looking for a beta

Gecko is the best I've found so far and the API is incredibly intuitive and really allows you to implement statistics from anything. If your looking for a beta invite, a company called http://geckoboardapps.com/ http://geckoboardapps.com/ is giving them out over twitter if you simply ask nice enough.