Email sign up form

I have installed an email newsletter script but unfortunately didn't supplied a sign up script.

In the instructions it says:

This newsletter is working as an API, it can be easily connected with your existing order form or any software you use to manage your orders online.

(simple call, like:
[code]<?php file_get_contents('http://www.yourdomain.com/AutoResponder/api.php?name=John&email=johm@gmail.com'); ?>[CODE]

I after a form that i can pasted into wordpress widget that will do the above call.

im not sure what the question is, but wufoo has really simple nice email forms you can make that will work nicely with wordpress.