Location intelligence and marketing research

Hello fellow IAIP members,

I'm very interested in insights or opinions on using location intelligence and location-based services to enhance the value of marketing research. Examples might include:
direct sales coverage
channel coverage
competitor coverage
trade areas
geodemographics
geo profiles of online communities
Sample selection
I look forward to your posts.

Best,

Frank Della Rosa, East Coast USA
fdr@symphoneticconsulting.com