You wanted Demographic information, and it's here. Go to: www.thegrimescene.com/forums and check the marketing area for definitions of dominant markets, and the zip code data you need for marketing this spring!
When you look at the zip code data, you'll need to look at the market name (dominant) and the definition of it to see how best to market your zip codes. If you have questions about it, ASK...
I'm just starting to post it, so be patient. Add your zip if you like to make sure I don't miss it.