In response to Mine.Eye's post recently, it should be noted that he referenced a post from May 2010. Apple has revised section 3.3.2 of their agreement but I'm not sure it is going to make any difference (ios_program_standard_agreeement_20120611.pdf).
3.3.2 An Application may not download or install executable code. Interpreted code may only be used in an Application if all scripts, code and interpreters are packaged in the Application and not downloaded. The only exception to the foregoing is scripts and code downloaded and run by Apple's built-in WebKit framework, provided that such scripts and code do not change the primary purpose of the Application by providing features or functionality that are inconsistent with the intended and advertised purpose of the Application as submitted to the App Store.
So this still leaves me wondering- can a PDF reader make use of embedded Javascript? A condensed summary of what I'd like to do from an iPad or iPhone is:
Create a PDF with fillable form data.
Have the user fill the data fields.
It would be nice to also allow the user to save the form before submitting.
Submit the data to a server.
Is this now possible via the revised agreement? The fact that people still seem to be having issues make me think it's just a pipe dream.