Q:

Enable Adobe extended pdf features in latex, backwards compatibility for saving form data

Is there a way with latex to enable Adobe Reader Extended PDF Features?  I am creating a pdf form using hyperref/eforms and want users to be able to save the data entered into the form locally, and to be able to do so with older versions of Adobe reader. 
I don't want to require users to email the form to me.  I just want the data entered into the form to be able to be saved locally and retain all form editing capability. 

A:

There are two applications which can apply Extended Rights to a PDF: Adobe Acrobat (Pro) and Adobe's Reader Extensions Server.  
These Extended Rights allow Adobe (Acrobat) Reader to do things which are normally restricted.  
However, with Adobe Reader XI, most of those restrictions (inflicted by Adobe) have been lifted.  This means that these Extended Rights no longer need to be applied. 
If old versions of Reader want to be supported (not the very best thing anyway, because Reader X and older are no longer supported by Adobe, so there are no security updates and bug fixes anymore), you would, as stated above, need Acrobat Pro to apply the rights needed according to he OP. 