I am the VP of Internet Media at a large media company and we are looking for a way to use open source software to rapidly role out web properties for our numerous movie, game, television, music and web offerings. We need to move very rapidly, be intensely creative in a Web 2.0 approach and be flexible to change. We need video, user generated content, ratings, personalization, points and forums.

Can you point to any other companies like ours that have done this?

Which open source software would you recommend?

Have you seen the Movielink case study? It sounds similar to your requirements.

In terms of open source software, I would suggest you consider Spring, Hibernate, symfony, and Alfresco.