I have a question. I know most of you as writers want to be able to have creative freedom while working on a game. But how do you do that? If you join a team you're more than likely going to be working around the ideas of the team lead or programmers and be writing a story/script for their idea. And if you want to start a game, I don't know how many programmers/artists/etc. are willing to work with a writer as a lead. Since most writers don't have the technical skills involved in creating a game you're not really in control of the project. So how do you as writers get into a position where you have creative freedom and are capable of building your own ideas, plots and stories?

In my opinion the only limit to the writer's imagination is his knowledge of the games industry.
The writing process should be creative and without limits. The ideas source and handling it into words should come from the subconscious mind without any interference from the logic of the conscious mind. The subconscious usually completes the idea from a to z and leaves no space for any addition if the writer gave his mind the required time of bringing an idea into being.
Team work spirit and 2 minds better than one will push the writer to apply modification on his work. But he finished his work as good as he can get with no intention of modification.
The only limitation the experienced writer should have is the boundaries of programming and graphics his producer has. His story line should be applicable to the hardware, doable to the programmers, suitable to the artists and acceptable to the producer's project time.

I fear that I will fall into that; besides the writing and ideas, I won't bring much to the group.

As this suggests though;
http://www.sloperama.com/advice/specs.htm
write out everything.
Get out all of your details, then once you think you have everything covered, ask for opinions on things from friends or co-workers: whether they like this idea, or prefer A to B in games. Bring up a game that is similar to the one you want to make and ask what they liked most about it, what made it stand out, and most importantly; if they would change anything, what would it be?
Do remember that it is all opinion, but perhaps they have thought of something that you hadn't that will greatly improve your idea, or strengthen a specific aspect of yours that was lacking. Maybe they will suggest something as "it would be cool if _" that completely flips what you were going for, or changes an entire portion of how the game will play for the better that you never would have thought of yourself.

Once you have a solid story, descriptions, characters, outline of how the gameplay will work, then find people to help you actually create it. If they love your idea as much as you, they may not see a need to change anything.
This in a way could be a test; describing your game to them should fire them up and make them want to be a part of creating it just as much as you. If not, then either you should probably revise your story or other points, or find someone else to work with. If they don't have a passion for the project, then they most likely won't put forth their best efforts.

Side note:
Yours friends may become annoyed by questioning and badgering for their opinions :P

Sunandshadow, does the very beginning of making your game have logic? I think the process you are using creating your game is that: you give your conscious mind all the data he needs to work your main plot then your conscious mind asks silently your subconscious whom gives you every answer you seek.
Tom Sloper, I get your idea and agree with. While handling the game plot every cell in the writer's body interact with the story. His thoughts, feelings, emotions and imagination get along with his decision of making a game. Surely he intends to make an interesting and a funny game which amazes everyone.