Update: It is official, read the Google Search Blog for the new snippet for list pages.
I can't replicate it but it might come up for you for searches on [new york real estate] where you see zillow.com results.
Here are pictures, one from @t1c1 and the other from the WebmasterWorld thread:
As you can see, real estate like information in the listing. Such as X number of listings followed by normal site snippet information with number of photos, addresses, price and more information.
I can't even replicate them in the rich snippet testing tool for these examples.
Have you seen these?
Forum discussion at WebmasterWorld.
Update: It is not just real estate, but also general listings. Here is an image Carlos Gonzalez Rotger shared on Google +:
Pretty cool anyone else see other examples?