Hi @brilliantlights, we have some instructions but not for all services yet. Here is some resources for you to check out :
Mailchimp: http://help.webflow.com/elements/forms#mailchimp
Aweber: http://forum.webflow.com/t/aweber-form-integration/8207/3
Zapier: http://help.webflow.com/elements/forms#zapier
Cheers,
Dave