After many months and months in development, former Radar editor and up-and-coming new media titan Remy Stern today launches Cityfile, a database of who's who in Manhattan industry circles. Artists, media types, socialites, designers, and foodies are all on board, with Stern's crack team of writer-researches having already compiled 2,109 names. The site promises to add new profiles all the time — but also, more excitingly, to drop names, too, because sometimes important people are suddenly no longer important, and this distinction MUST BE MADE.

So what's a site like this good for? For blogs like ours, the answer is obvious: Free research tool! For others, however, Cityfile as a resource might be less clear. Allow us to help.

You can use Cityfile to:

1) Get back at your old boss. Cityfile does not have Wikipedia-esque editing capabilities, which means not just anyone can edit their listings. But right up there at the top is a big 'ole "Contribute" link, which means they're actively soliciting people to add new profiles and keep their current roster updated. For a flat freelance fee, you can get paid to infiltrate their file system and add malicious details to your former employer's write up. Easy money is on Harvey Weinstein being attacked this way first.

2) Find a new boyfriend, girlfriend, or backgammon partner. In this respect, Cityfile is better than JDate, Facebook, ASmallWorld, and Pocket Change's Speed Dating gimmicks combined. Cityfile lists residences, wealth, and who they boinked before you in an easy-to-read format. Much simpler than digging through somebody's trash like a crazy person!

3) Find your famous neighbors. You already scan paparazzi photos of Sarah Jessica Parker and Jake Gyllenhaal leaving their houses to find glimpses of building numbers and recognizable landmarks so you can pinpoint exactly where they live. But with Cityfile, the guesswork is done for you: Just select which neighborhood you'd like to stalk in — Mary Louise Parker and Mark Ronson are in Greenwich Village — and a whole list of people more famous, more rich, and with fewer restraining orders than you will pop up. Prest-o stalk-o!

And once they get the New York City version stable — the site is slooowww right out of the gate — expect expansions into Los Angeles and other cities with less impressive Powerful People Per Capita ratios.