We've tried a lot of different methods over time. Currently the LifeWiki --

  https://conwaylife.com/wiki/Main_Page

-- is the most likely central location; any sufficiently big news will probably find its way into the CurrentNews pane, sooner rather than later.

For a couple of years I've been trying to keep up with an informal summary of new developments, in an email-newsletter form mostly intended for "old-guard" Lifenthusiasts:

  https://conwaylife.com/forums/viewtopic.php?f=7&t=5650

As I mostly expected, it ends up being a bit too much work for one person to do properly. But the back issues there do go into a bit more detail than there is room for in LifeWiki CurrentNews back issues.