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Thank you, John. That is helpful.

You will have to find a few resources to gather the information you are looking for. Check out some of the MozCON 2011 Bundle and Pro Webinars. In Pro Webinars Mike King just had a nice presentation about different tools he uses to get  understand the personas and their purchasing habit. In the various other videos the experts talk about different resources they use... just look around great stuff.

Thanks a bunch, Lavellester. Just finished Tom's post - exactly what I needed. I appreciate your help, H