Why would a press release about an updated real estate site for Chicago note its "extraordinary, proprietary interactive map and address search that lets users see everything there is to do and see around a specified location?" I understand "extraordinary" and "lets user see everything"; I guess proprietary still means not only "we are the only ones who have it" but also, "it's way better than everyone else's."

It did work on me; I checked out the site which offers a Google Maps-based search tool and that includes overlays of locations of restaurants, gyms, grocery stores, etc. It's sort of a combination local search/real estate search tool. Also of note, you can fill out a form to receive a free printed Chicago neighborhoods map. (pdf) I guess I'd have put that in the press release!

By the way, I found no sources for the data on the mapping app, but was disappointed that mousing over say a museum didn't reveal its name, but rather its address.