After 18 weeks of beta testing Hulu today announced that they are now open for all, no need for invites, all you need is to sign up to Hulu and start enjoying the videos. In post made on there blog :

” In these short 18 weeks since we began private beta testing, we’ve been working hard to kick the tires and check under the hood in preparation of opening the doors to our site. With well over 10,000 pieces of user feedback, we’ve heard your suggestions, comments, criticisms and praise. Today we are excited to leave our private beta and open Hulu.com to everyone in the U.S.. Our streaming video service is free – anyone in the U.S. with a broadband internet connection and a computer can just press play to enjoy. “