Hitwise just released their January 2009 ranking of the top real estate websites, according to market share.
In case you aren't familar with Hitwise, they track how approximately 10 million US Internet users interact with more than 1 million websites each month. They then rank these sites within the appropriate industry based on usage, or what they consider to be market share.
To help put some hard numbers behind it, in January Zillow had more than 7.5 Million Unique Users visit the site (our best month ever!).
I highlighted the sites in green that as an Agent, you could actually utilize to market your business in some way. The orange highlights represent brokerage websites (which all Agents still get some exposure on thru IDX).
Not surprising to see a number of foreclosure related sites on the list.