Given the importance of Dojo to the Xpages development process it was interesting that two different people highlighted the release of the Web Builder
The Web Builder is an online solution providing an intuitive web interface to the existing build tools, allowing you to create customised Dojo builds using just your web browser . This new tool will dramatically lower the barrier to entry for the build system, easing new users into the process of using a build tool.
The ease of use for beginners to the Dojo toolkit is the key thing here – creating a compact and optimised version for use in applications such as xpages by hand is not the kind of thing developers want to be doing.
You will find an article and video here which explain the tool very succinctly.