To recover our broken roadmap, CVS of XOOPS Cube is updated every day. And, you can receive the notification by the special Mailing List, when developers commit update source code to CVS. The notification is written diff and comment in poor English. This ML is useful for you to notice the movement of the core development team.
To start receiving the notification, you have to register your mail address in this page. The registration page is written in Japanese. But, don't worry because the notification is written in English. Look at the following image. You may write your mail address, your password and your confirm password into the following text-box.
In addition, comments in files isn't fine but include some useful informations. Logs of CVS and these comments make it easy to understand changes.