The media reform network has a petition about the FTAA and media democracy.
The bottom line with the FTAA is simple: even if it's the best thing ever for everyone (and there is every indication that it isn't), it's happening in secret, in reference to secreat documents, so there's simply no way to know.
A simple way to guess at the content of negotiations is to ask who has access to the process of creation. In this case, it's politicians and corporate lobbyists who have the most access, as well as the most momentum. It's not hard to guess at who the result will benefit, and at whose expense.
Looking for basics? Global Exchange has a list of frequently asked questions.