posting data from a PDF form to a web script
This took me awhile to figure out, so I thought I'd put it here FWIW:
Open Acrobat and launch the Designer: click Forms on the Tasks toolbar > Create New Form (or Edit Fillable Form if one is already open)
Insert form fields as desired, naming each one via the Binding tab in its Object Window (click Window > Object if it's hidden). For example, say you insert a text text and name it txtName
Insert > Standard > HTTP Submit Button
In the URL field in the button's Object window, enter the url of the script to receive the data
Highlight the submit button and click the XML Source tab. Below the tag, near the tag for the button, find and change format="formdata" to format="urlencoded"
Save the PDF, saying yes when asks you if you're sure you want to modify the XML manually. Post the PDF on a website.
In the script that is to receive the data, use something like this in PHP:
<? $name = $_POST["txtName"]; ?>
or this in ASP: <% name = Request("txtName")>
Then add code to send it in a message, save to database, etc., just as if it came from a regular HTML form.