Google Maps curl animation in MKMapView / Map Kit on iOS4

Anyone know whether (and if so, how) we can create the half-turned page effect Google Maps on the iPad uses to show the options to change the Map type?..

See below image to see what I'm talkin' about..

Incidentally, any pretty good Map Kit tutorials you guys know of that are out there? (covering anything new brought on through iOS4) Support for Map Kit ain开发者_JAVA百科't much out there it seems...

Thanks!

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It's a new UIModalTransitionStyle in iOS 4.0 called UIModalTransitionStylePartialCurl

re: good mapkit tutorials, watch the WWDC map overlays video.