Facebook has a so called "check-in" feature which allows you to report your current location from within the iPhone app and other applications. The presumed positive side effect of this is to tell your friends where you are, find friends near your location or discover the neighborhood.
Most people are probably only using the feature to brag about all the cool places they are checking in.

All along Facebook is collecting information about to build a detailed movement profile which it can relate to its advertisers.

So why don't we just post random locations? Send tons of trash data and false information to Facebook? Why not brag about our nice lunch in Monaco and our dinner in New York? Of course you'll be at business meeting in Dubai tomorrow?

EverywhereApp allows you to check-in to any place all over the world without actually being there.

After log-in with your Facebook account you'll see a Google Map. Center the map to a place where you want to check-in, then 'Load Places', choose a place, add a message if you want, and finally post it to your Facebook wall.

EverywhereApp only saves session data while you're logged in to identify you. After you logout all data is erased.

Facebook won't believe you when you try to check into multiple locations half across the world. You'll have to consider a somewhat realistic travel time between each check-in.

This is a very early beta. You'll probably see unexpected errors.