Easy Sign Up by Andrew R is a WordPress Plug-in that collects e-mail addresses and then redirects the visitor to a url. Current version 1.2.
The plug-in generates a customizable thank you email that’s sent to the visitor and the visitor’s email and name are sent to an email address of your choosing. Possible use is collecting email address for a newsletter, or leads for your sales force before redirecting to a brochure.
Email address collection
Plugin homepage with screenshots and full info: http://www.greenvilleweb.us/blog/wordpress/plugins/easy-sign-up-1-2-update/