We previously blogged about using credit scores in pricing auto insurance and hospital care. Some states, however, have banned using this information to price insurance.
Here's an interesting chart that indicates companies might be able to use other indicators to get an idea of your credit score. Based on an analysis of over 20,000 credit scores by Credit Karma, an online credit checking service, email addresses appear to give an indication of credit score. I can understand why we might see higher scores for Comcast and Bellsouth email addresses (you have to buy something to get those), but the differences in the free accounts seem to indicate that there are different types of users for each service. Here's the chart.