The Symbian Foundation is planning to move to twice a year release schedule, which means user -- and more importantly, cellphone makers -- will be able to plan for updates. The Symbian operating system is found on millions of cellphones.Symbian won't be the first operating system to be released on a regular schedule, as opposed to "when it's ready." The folks at Canonical have been releasing a new version of Ubuntu Linux every six months for the last few years. It's true, that not every new build is loaded with dramatic changes from earlier versions. But that's a good thing. Can you imagine using a cellphone or desktop operating system that launched an entirely new interface every six months? There's a reason Windows has been using some form of the Start Menu for years, while Apple has adopted the Dock. It makes the learning curve a lot simpler when users simply have to get used to minor tweaks and changes and not a whole new paradigm.
That's not to say that Symbian, Canonical, or any other groups putting out software on a regular schedule won't occasionally have releases that proide a major shakeup. Those are important too. But when you're shooting for a six month release schedule, the most important thing is to make sure that all the features work by the time a new version is unleashed on the public.