Hulu.com the online video on demand service is limited to invited private beta users only for now, and you need to have HULU invites to join.

However you can bypass this restriction of invite only service and still watch all the videos by using alternative services offering hulu videos embedded on their websites as private beta users are allowed to do this.

Their exist two websites to access Hulu videos:

• OpenHulu
• HelloHulu

Only US users can watch the videos, however you can try proxy utilities like "Anonymizer Anonymous Surfing" to bypass this restriction.

UPDATE: Latest working hack to bypass Hulu, ABC TV, Pandora etc. US only restriction and watch full quality video and audio streams outside USA.