New kid on the block of online information sources, EveryBlock launched on January 23rd.
I would not call it a guide rather a source of local information on restaurant inspections, crime reports, housing issues (building permits and violations), business reviews and a lot of photos.
Search by Street, Neighborhood, Address and hopefully find what you need.
It might be a good way to have a feel for a place if you think about moving.
Keep up the good work…
Along the same lines (new and useful): ‘World Taximeter’ Checks your Cab Fare
Found it on Think Vitamin