Are you availing of services like Quantcast, Compete.com and Google Trends for Websites? Which ones and why?

On various sites, we've got embedded tracking code from Urchin / Google Analytics,
Quantcast, HBX, and Omniture for various clients. Then there's NuConomy, Woopra and Piwik.

Given the number of tools available, primarily at no-charge, there's plenty of available data about how much and from where their visitors come and what they look at or how long. What about intelligence from that data?

With all this good data, inventory management remains an issue. trend-spotting remains an issue: i want intel from all these sources, and maybe others, to help me figure out where I might be next week or next month.

There must be tools that do this - I'm hoping to to figure out the best way to find or develop them.

Want to help?