Update: September 18, 2013: Whatsapp on iPad without jailbreak runs on iOS 7.0, too!
I have already posted about how to install Whatsapp on an iPad without jailbreaking it. At that time, iOS 6.1.3 was installed on my iPad 4th generation cellular. In the meantime iOS 7 beta was released and both my iPad and my iPhone 4S are now running on iOS 7 beta (2). The beta release is not very stable at the moment, there are often crashes. However, what was more important to me was to answer the question wether the Whatsapp tweak is still possible.
Therefore, I followed the step-by-step Whatsapp workaround, using my iPhone 4S, my iPad 4th generation and iFunBox. And indeed, it is still feasable to get Whatsapp running on an iPad without jailbreak on iOS 7 beta (2):