Apple has released iOS 3.2.2 for the Apple iPad are out. This update fixed the vulnerabilities in iOS which allows hackers to execute malicious code via PDF exploit in Safari. JailbreakMe used this exploit to jailbreak all iPhones, iPod Touches and iPads.
This update patches this exploit and thus doesnt allow a jailbreak using Jailbreakme until a newer version of the tool has been released.