Something that's heard over and over again in Second Life when talking to companies and businesses about their virtual world operations is a desire for far, far better visitor statistics to be made available. For right now, Linden Lab, makers of the 3D Metaverse, don't provide much in the way of stats, but Mechanized Life, a company working with various web api's to create mashups and integration apps for Second Life, hope to fill that need in the near future.
I was fortunate enough to get a sneek preview of a very early beta for advanced reporting on Mech Life's RSS Sensor app. The new system was able to tell me details about who visited on what days of the week, visits by age, visits by payment status and the top visiting avatars to a region.
Though Alidar Moxie, who runs Mech Life says there is much work to do on the product as of yet, and pricing has yet to be finalized, it looks promising, and I can see a whole stack of companies subscribing to such service. More on this as it develops.