Also available for Android (<a href="https://play.google.com/store/apps/details?id=com.parkingd" rel="nofollow">https://play.google.com/store/apps/details?id=com.parkingd</a>) and for Windows Phone(<a href="http://www.windowsphone.com/en-US/apps/709e8965-0662-4f39-9183-56297c2b07ec" rel="nofollow">http://www.windowsphone.com/en-US/apps/709e8965-0662-4f39-91...</a>)
The greek FAQ isn't crystal clear when translated, and "seekers" is only making me think of quiddich, but definitely seems like a way to turn finding a parking space in a busy/heavily populated dense city into a game, not sure it would work anywhere else though!
If you own a car, you'll definitely find it useful. Really well designed and great execution. As every crowd sourced app, needs support from the community, so it takes time to build. It will get there.