If you're launching a site (or ISP), you will need to register a designated DMCA agent with the US copyright office. You'll then be listed here: http://www.copyright.gov/onlinesp/list/a_agents.html The fee is $35 and there is a form you'll fill out on copyright.gov. They don't allow PO Boxes, you will need an address that is available for service of process.
If you don't register an agent, you are not protected by the DMCA safe harbor provisions.
Once you've got a registered agent, you'll need to internally create a DMCA notification procedure that you'll follow once you receive them. The system is very simple and extremely fair to ISPs/sites. Talk to a lawyer, but most don't know the DMCA well and you can find this stuff out on your own generally.
If you don't register an agent, you are not protected by the DMCA safe harbor provisions.
Once you've got a registered agent, you'll need to internally create a DMCA notification procedure that you'll follow once you receive them. The system is very simple and extremely fair to ISPs/sites. Talk to a lawyer, but most don't know the DMCA well and you can find this stuff out on your own generally.