We have a Force.com site on a subdomain: help.website.com. On the Force.com site is a form, which creates a case when it is submitted (Web-to-case I believe). The case is created by an Apex class associated with the page the form is on.
We'd like to move the form to our main site, website.com. We still want the form to submit to Salesforce, and create a case.
Does anyone know how to do this most easily? I can only think of two options: API integration or iFrame.