Apple has just released iOS 4.0.2 for the iPhone and iOS 3.2.2 for the iPad, officially addressing the security exploit that was uncovered by the userland iOS jailbreak.
Aside from the security patches, it appears as if no other changes have been pushed out to either version of iOS. Apple's security documents for the iPhone and iPad further detail the changes.
When the web-based iOS 4 jailbreak was released earlier this month, hackers and security experts were both impressed and distressed by the results. On the one hand, the work that went into developing the web-based jailbreak was extremely impressive. On the other hand, publication of the exploit created the potential for malware developers to exploit a user's phone using the PDF-based stack buffer overflow.