Enable iOS 4.3 gesture controls on your iPad with free Xcode 3 download
Don't despair, however: they can be re-enabled by turning your iPad into a developer iPad by using Apple's Xcode developer tools. Our bleached and glistening cousins at TUAW originally reported that you had to pay $5 to get Xcode 4 from the Mac App Store, but our very own Samuel Gibbs found that the free-to-download Xcode 3 works just fine.
To unlock iOS 4.3's gesture controls on your iPad, download and install Xcode 3 (bottom of the page), open Xcode, connect your iPad to your PC, then Window > Organizer and press the "Use for development" button. You can also download Xcode 3 from elsewhere on the Internet if you don't want to sign up for an Apple ID.
Let us know in the comments if you successfully enable gestures on your iPad!