Kubuntu is a great part of the Ubuntu project and is quickly maturing. From its start as the idea of a single developer to many people working together, Kubuntu is becoming the KDE distribution of choice. However, there is still room for improvement and additions to the setup. A large community of people discuss every day, either through IRC or e-mail, ways to make these improvements. Bugs and other issues are quickly resolved without the additional cost of new programs.
Kubuntu is going to be around for the long haul, and each new release delivers a better, cleaner, and more polished OS. Help spread the word about the project, and get involved by helping out.