Nice tutorial. It was very straight forward to follow and I got my twiki running on EC2 (and managed to setup Elastic IP on it!) I had some issue setting up security group though.. mainly because I didn't know that I can't change the security group name once I create my instance. Can you explain how much Amazon will charge to run TWiki on EC2?

PeterThoeny - 2011-06-02:

I am glad it worked out for you Soichi-san. I do not know the monthly cost, but I think you can estimate using the EC2 cost calculator, http://calculator.s3.amazonaws.com/calc5.html. Are you a developer? I invite you to get involved with our community.