Welcome to the Jailbroken Club, Google. As surely as there are hackers, so is there jailbreaking of popular and up-and-coming OS's. Even though the Android OS is an open system, Google isn't crazy about users having access to the goodies behind the scenes of the Android OS as evidenced by their statement responding to the jailbreaking issue:
We’ve been notified of this issue (Jailbreaking of Android) and have developed a fix. We’re currently working with our partners to push the fix out and updating the open source code base to reflect these changes.
Google's fix (patch) should be available in the next firmware update, RC30. Like I said, welcome to jailbreaking, Google. Be prepared for the endless cycle of patch - jailbreak - patch - jailbreak, ad infinitum. Even though the Android OS is open, there seems to be benefits for the programming diehards to jailbreak.