Discover where everyone like YOU is right now.

If you are lucky enough to be on holiday and looking for a party in San Francisco this summer, and you are a Blackberry user, then you will have a direct line on all the hottest spots thanks to Citysense:

Citysense was built to show you where the action is, right now.

Using a billion points of GPS and WiFi positioning data from the last few years – plus real-time feeds – Citysense sees S.F. from above and puts the top live hotspots in your hand. You don’t even need to sign up, just go to citysense.com on your BlackBerry, download, and open.

What’s at hotspot #1?

Click over to Yelp or Google and find out what’s going on at the #1 hotspot: Bars? Clubs? Restaurants? Then check out what’s at #2. All with one-handed navigation: no typing needed.

Show me where the unusually high activity is

Even if you’re a local, Citysense can give you the live details you need. When the Mission or Soma is busier than normal – you’ll know immediately.

We can’t wait until this service finds it way to the great cities of the world. It’s the creation of Columbia University computer science professor Tony Jebara instantly shows people where the hottest clubs or hangouts are, in real time. [via Columbia News and Roland Piquepaille's Technology Trends]

Jebara’s creation, Citysense, uses advanced machine learning techniques to number crunch vast amounts of data emanating from thousands of cell-phones, GPS-equipped cabs and other data devices to paint live pictures of where people are gathering. Fed to websites such as Google or Yelp, the data reveals what’s happening at any location.

Translation: if you have a Blackberry, you have instant 411 on where the cool folks are. Or, are not. (An IPhone version is coming). The technology can also show if your favorite commute route is backed up and possibly offer alternative ones. Other applications abound.

And what’s next? “When you use Citysense, the application learns about the kinds of places you like to go from GPS – without ever sharing that information. In its next release, Citysense will not only tell you where everyone is right now, but where everyone like YOU is right now.

The application will compare your history and preferences with those of other users, and show you where you’re most likely to find people with similar tastes at that moment. So each person’s nightlife map will look a little different, and will display a unique top hotspot list. Cool, huh? That’s why we save your location when you use Citysense: to remember what you like. Of course, you don’t have to keep a personalized nightlife profile. You can delete your data from our system anytime you want. You created your data: you own it.”

What do you think? Would you use a service like this? Wouldn’t everybody? Would the “hottest parties” become overcrowded?