Transformers Revenge of the Fallen is now at $760 million worldwide.
What does this mean? It means it has just barely surpassed the lifetime (theatrical) profits of the first Movie. The first film took in $708 million worldwide, but cost $50 million less to make ($150 million production budget for movie 1, $200 million for movie 2).
Keep in mind that this is only after 1 month of release for Revenge of the Fallen vs the entire lifetime of the first film.