ILMJ, CRA Wiz will give you demographic data, such as total # of housing units in each tract level, and also breaks it down further, like # of owner units, rental units, vacant units, single family, etc. The data comes from the US Census. You can compare your institution's loan concentration to other institutions in your area via reports if you have the right additions to the software, like Peer Group data.
I have used both the CRA Wiz and Fair Lending Wiz modules for about 5 years, and I would highly recommend them.
The last thing that blew my mind was the wind.