Trulia has this information. Please see the link below.
Customer Service Representative
You need to register but it is not through a specific agent and all the emails I choose to get I want. There is no solicitation. It has some defaults from your profile for getting general zip code data or choosing comps based on the info you entered, but I use just what I need instead of what it thinks I need.
For example, My Neighborhood - Zip Code Averages uses your profiles zip code. Where as the Area Search allows you to put in whatever zip code you want. So if you are buying, you want to use the home you want to purchase as your profile address.
Information is POWER, but a Realtor can look out for your best interests and help you interpret the data. I've read hundreds of Patti's posts and would highly recommend her.