How to integrate My public Domain website with Salesforce?

I want to integrate my company website with salesforce开发者_运维问答.com. How can I do this?

---

If you're looking for the web-to-lead feature for capturing leads on your site, here's the info:

"To start capturing Leads from your Web site, go to Setup -> Customize --> Leads --> Web-to-Lead." http://www.salesforce.com/community/crm-implementation/custom-lead-functionality.jsp