I've also wanted to be able to browse Maven's website and have a summary of all changes. Then come back a few days later and then again see what's new. This is for example what you can see on Cactus's changes web page

In order to activate this report, you need to create a changes.xml file in your xdocs directory. The format of this file is as follows:

Where the "type" attribute can be: add, remove, update or fix.

An example of the generated report can be seen on the PatternTesting web page