i use ubuntu on a daily basis and have learned that its pretty buggy. If i can compare it to osx I would say that osx is much better for a web development environment because of all the amazing apps that exist on osx. Ubuntu might end up being amazing in the future but its going to take time by users adding more apps and having it be more stable. As far as windows goes i'm surprised their still not using a unix foundation. That whole c:/ crap has to go