Second Life Analytics is something that is on my radar for a while and there are only a few companies competing for it. By coincidence I ended up on Second Labs Analytics page today. The Second Labs Analytics seemed to be pretty advanced. It tracks every single avatar, campaigns,geolocation and many other things. Another great feature is the IM function. A Second Lab Analytics user can IM all the visitors and market to them.
If you need to know more about Second Life Analytics check also V-tracker .