I would disagree with you that Peter in Acts was about "eating anything you wanted". I believe God was trying to show Peter that the Gospel was Universal (for the gentiles too) not a "Jew only" phenomenon. If you read acts you'll see that Peter had problems in this area especially in areas regarding strict observence of the traditional Jewish law.
I'd also like to point out that we were created to only eat fruit (this would include grain and legumes). After the flood animals were given to us to eat, as well as a shortened life-span. God much have flicked some sort of "switch" in human metabolism, and I now think that some meat in the diet is not only good but necessary. Although, living off of red-meat every day and every day probably is not the best idea.
Then where in the Bible does it say to not to eat meat? Produce this, and I will believe you.....